/*
* ATTENTION: An "eval-source-map" devtool has been used.
* This devtool is neither made for production nor for readable output files.
* It uses "eval()" calls to create a separate source file with attached SourceMaps in the browser devtools.
* If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
* or disable the default devtool with "devtool: false".
* If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
*/
exports.id = "vendor-chunks/web-streams-polyfill";
exports.ids = ["vendor-chunks/web-streams-polyfill"];
exports.modules = {
/***/ "(action-browser)/./node_modules/web-streams-polyfill/dist/ponyfill.es2018.js":
/*!*******************************************************************!*\
!*** ./node_modules/web-streams-polyfill/dist/ponyfill.es2018.js ***!
\*******************************************************************/
/***/ (function(__unused_webpack_module, exports) {
eval("/**\n * @license\n * web-streams-polyfill v3.3.3\n * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors.\n * This code is released under the MIT license.\n * SPDX-License-Identifier: MIT\n */\n(function (global, factory) {\n true ? factory(exports) :\n 0;\n})(this, (function (exports) { 'use strict';\n\n function noop() {\n return undefined;\n }\n\n function typeIsObject(x) {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n }\n const rethrowAssertionErrorRejection = noop;\n function setFunctionName(fn, name) {\n try {\n Object.defineProperty(fn, 'name', {\n value: name,\n configurable: true\n });\n }\n catch (_a) {\n // This property is non-configurable in older browsers, so ignore if this throws.\n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n }\n }\n\n const originalPromise = Promise;\n const originalPromiseThen = Promise.prototype.then;\n const originalPromiseReject = Promise.reject.bind(originalPromise);\n // https://webidl.spec.whatwg.org/#a-new-promise\n function newPromise(executor) {\n return new originalPromise(executor);\n }\n // https://webidl.spec.whatwg.org/#a-promise-resolved-with\n function promiseResolvedWith(value) {\n return newPromise(resolve => resolve(value));\n }\n // https://webidl.spec.whatwg.org/#a-promise-rejected-with\n function promiseRejectedWith(reason) {\n return originalPromiseReject(reason);\n }\n function PerformPromiseThen(promise, onFulfilled, onRejected) {\n // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n // approximation.\n return originalPromiseThen.call(promise, onFulfilled, onRejected);\n }\n // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n // from that handler. To prevent this, return null instead of void from all handlers.\n // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\n function uponPromise(promise, onFulfilled, onRejected) {\n PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);\n }\n function uponFulfillment(promise, onFulfilled) {\n uponPromise(promise, onFulfilled);\n }\n function uponRejection(promise, onRejected) {\n uponPromise(promise, undefined, onRejected);\n }\n function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {\n return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n }\n function setPromiseIsHandledToTrue(promise) {\n PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n }\n let _queueMicrotask = callback => {\n if (typeof queueMicrotask === 'function') {\n _queueMicrotask = queueMicrotask;\n }\n else {\n const resolvedPromise = promiseResolvedWith(undefined);\n _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n }\n return _queueMicrotask(callback);\n };\n function reflectCall(F, V, args) {\n if (typeof F !== 'function') {\n throw new TypeError('Argument is not a function');\n }\n return Function.prototype.apply.call(F, V, args);\n }\n function promiseCall(F, V, args) {\n try {\n return promiseResolvedWith(reflectCall(F, V, args));\n }\n catch (value) {\n return promiseRejectedWith(value);\n }\n }\n\n // Original from Chromium\n // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n const QUEUE_MAX_ARRAY_SIZE = 16384;\n /**\n * Simple queue structure.\n *\n * Avoids scalability issues with using a packed array directly by using\n * multiple arrays in a linked list and keeping the array size bounded.\n */\n class SimpleQueue {\n constructor() {\n this._cursor = 0;\n this._size = 0;\n // _front and _back are always defined.\n this._front = {\n _elements: [],\n _next: undefined\n };\n this._back = this._front;\n // The cursor is used to avoid calling Array.shift().\n // It contains the index of the front element of the array inside the\n // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n this._cursor = 0;\n // When there is only one node, size === elements.length - cursor.\n this._size = 0;\n }\n get length() {\n return this._size;\n }\n // For exception safety, this method is structured in order:\n // 1. Read state\n // 2. Calculate required state mutations\n // 3. Perform state mutations\n push(element) {\n const oldBack = this._back;\n let newBack = oldBack;\n if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n newBack = {\n _elements: [],\n _next: undefined\n };\n }\n // push() is the mutation most likely to throw an exception, so it\n // goes first.\n oldBack._elements.push(element);\n if (newBack !== oldBack) {\n this._back = newBack;\n oldBack._next = newBack;\n }\n ++this._size;\n }\n // Like push(), shift() follows the read -> calculate -> mutate pattern for\n // exception safety.\n shift() { // must not be called on an empty queue\n const oldFront = this._front;\n let newFront = oldFront;\n const oldCursor = this._cursor;\n let newCursor = oldCursor + 1;\n const elements = oldFront._elements;\n const element = elements[oldCursor];\n if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n newFront = oldFront._next;\n newCursor = 0;\n }\n // No mutations before this point.\n --this._size;\n this._cursor = newCursor;\n if (oldFront !== newFront) {\n this._front = newFront;\n }\n // Permit shifted element to be garbage collected.\n elements[oldCursor] = undefined;\n return element;\n }\n // The tricky thing about forEach() is that it can be called\n // re-entrantly. The queue may be mutated inside the callback. It is easy to\n // see that push() within the callback has no negative effects since the end\n // of the queue is checked for on every iteration. If shift() is called\n // repeatedly within the callback then the next iteration may return an\n // element that has been removed. In this case the callback will be called\n // with undefined values until we either \"catch up\" with elements that still\n // exist or reach the back of the queue.\n forEach(callback) {\n let i = this._cursor;\n let node = this._front;\n let elements = node._elements;\n while (i !== elements.length || node._next !== undefined) {\n if (i === elements.length) {\n node = node._next;\n elements = node._elements;\n i = 0;\n if (elements.length === 0) {\n break;\n }\n }\n callback(elements[i]);\n ++i;\n }\n }\n // Return the element that would be returned if shift() was called now,\n // without modifying the queue.\n peek() { // must not be called on an empty queue\n const front = this._front;\n const cursor = this._cursor;\n return front._elements[cursor];\n }\n }\n\n const AbortSteps = Symbol('[[AbortSteps]]');\n const ErrorSteps = Symbol('[[ErrorSteps]]');\n const CancelSteps = Symbol('[[CancelSteps]]');\n const PullSteps = Symbol('[[PullSteps]]');\n const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n\n function ReadableStreamReaderGenericInitialize(reader, stream) {\n reader._ownerReadableStream = stream;\n stream._reader = reader;\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseInitialize(reader);\n }\n else if (stream._state === 'closed') {\n defaultReaderClosedPromiseInitializeAsResolved(reader);\n }\n else {\n defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n }\n }\n // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n // check.\n function ReadableStreamReaderGenericCancel(reader, reason) {\n const stream = reader._ownerReadableStream;\n return ReadableStreamCancel(stream, reason);\n }\n function ReadableStreamReaderGenericRelease(reader) {\n const stream = reader._ownerReadableStream;\n if (stream._state === 'readable') {\n defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n else {\n defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n }\n stream._readableStreamController[ReleaseSteps]();\n stream._reader = undefined;\n reader._ownerReadableStream = undefined;\n }\n // Helper functions for the readers.\n function readerLockException(name) {\n return new TypeError('Cannot ' + name + ' a stream using a released reader');\n }\n // Helper functions for the ReadableStreamDefaultReader.\n function defaultReaderClosedPromiseInitialize(reader) {\n reader._closedPromise = newPromise((resolve, reject) => {\n reader._closedPromise_resolve = resolve;\n reader._closedPromise_reject = reject;\n });\n }\n function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseReject(reader, reason);\n }\n function defaultReaderClosedPromiseInitializeAsResolved(reader) {\n defaultReaderClosedPromiseInitialize(reader);\n defaultReaderClosedPromiseResolve(reader);\n }\n function defaultReaderClosedPromiseReject(reader, reason) {\n if (reader._closedPromise_reject === undefined) {\n return;\n }\n setPromiseIsHandledToTrue(reader._closedPromise);\n reader._closedPromise_reject(reason);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n }\n function defaultReaderClosedPromiseResetToRejected(reader, reason) {\n defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n }\n function defaultReaderClosedPromiseResolve(reader) {\n if (reader._closedPromise_resolve === undefined) {\n return;\n }\n reader._closedPromise_resolve(undefined);\n reader._closedPromise_resolve = undefined;\n reader._closedPromise_reject = undefined;\n }\n\n /// \n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\n const NumberIsFinite = Number.isFinite || function (x) {\n return typeof x === 'number' && isFinite(x);\n };\n\n /// \n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\n const MathTrunc = Math.trunc || function (v) {\n return v < 0 ? Math.ceil(v) : Math.floor(v);\n };\n\n // https://heycam.github.io/webidl/#idl-dictionaries\n function isDictionary(x) {\n return typeof x === 'object' || typeof x === 'function';\n }\n function assertDictionary(obj, context) {\n if (obj !== undefined && !isDictionary(obj)) {\n throw new TypeError(`${context} is not an object.`);\n }\n }\n // https://heycam.github.io/webidl/#idl-callback-functions\n function assertFunction(x, context) {\n if (typeof x !== 'function') {\n throw new TypeError(`${context} is not a function.`);\n }\n }\n // https://heycam.github.io/webidl/#idl-object\n function isObject(x) {\n return (typeof x === 'object' && x !== null) || typeof x === 'function';\n }\n function assertObject(x, context) {\n if (!isObject(x)) {\n throw new TypeError(`${context} is not an object.`);\n }\n }\n function assertRequiredArgument(x, position, context) {\n if (x === undefined) {\n throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n }\n }\n function assertRequiredField(x, field, context) {\n if (x === undefined) {\n throw new TypeError(`${field} is required in '${context}'.`);\n }\n }\n // https://heycam.github.io/webidl/#idl-unrestricted-double\n function convertUnrestrictedDouble(value) {\n return Number(value);\n }\n function censorNegativeZero(x) {\n return x === 0 ? 0 : x;\n }\n function integerPart(x) {\n return censorNegativeZero(MathTrunc(x));\n }\n // https://heycam.github.io/webidl/#idl-unsigned-long-long\n function convertUnsignedLongLongWithEnforceRange(value, context) {\n const lowerBound = 0;\n const upperBound = Number.MAX_SAFE_INTEGER;\n let x = Number(value);\n x = censorNegativeZero(x);\n if (!NumberIsFinite(x)) {\n throw new TypeError(`${context} is not a finite number`);\n }\n x = integerPart(x);\n if (x < lowerBound || x > upperBound) {\n throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n }\n if (!NumberIsFinite(x) || x === 0) {\n return 0;\n }\n // TODO Use BigInt if supported?\n // let xBigInt = BigInt(integerPart(x));\n // xBigInt = BigInt.asUintN(64, xBigInt);\n // return Number(xBigInt);\n return x;\n }\n\n function assertReadableStream(x, context) {\n if (!IsReadableStream(x)) {\n throw new TypeError(`${context} is not a ReadableStream.`);\n }\n }\n\n // Abstract operations for the ReadableStream.\n function AcquireReadableStreamDefaultReader(stream) {\n return new ReadableStreamDefaultReader(stream);\n }\n // ReadableStream API exposed for controllers.\n function ReadableStreamAddReadRequest(stream, readRequest) {\n stream._reader._readRequests.push(readRequest);\n }\n function ReadableStreamFulfillReadRequest(stream, chunk, done) {\n const reader = stream._reader;\n const readRequest = reader._readRequests.shift();\n if (done) {\n readRequest._closeSteps();\n }\n else {\n readRequest._chunkSteps(chunk);\n }\n }\n function ReadableStreamGetNumReadRequests(stream) {\n return stream._reader._readRequests.length;\n }\n function ReadableStreamHasDefaultReader(stream) {\n const reader = stream._reader;\n if (reader === undefined) {\n return false;\n }\n if (!IsReadableStreamDefaultReader(reader)) {\n return false;\n }\n return true;\n }\n /**\n * A default reader vended by a {@link ReadableStream}.\n *\n * @public\n */\n class ReadableStreamDefaultReader {\n constructor(stream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n assertReadableStream(stream, 'First parameter');\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n ReadableStreamReaderGenericInitialize(this, stream);\n this._readRequests = new SimpleQueue();\n }\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed,\n * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n */\n get closed() {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n }\n return this._closedPromise;\n }\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason = undefined) {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n }\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n /**\n * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n *\n * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n */\n read() {\n if (!IsReadableStreamDefaultReader(this)) {\n return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n }\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n let resolvePromise;\n let rejectPromise;\n const promise = newPromise((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamDefaultReaderRead(this, readRequest);\n return promise;\n }\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock() {\n if (!IsReadableStreamDefaultReader(this)) {\n throw defaultReaderBrandCheckException('releaseLock');\n }\n if (this._ownerReadableStream === undefined) {\n return;\n }\n ReadableStreamDefaultReaderRelease(this);\n }\n }\n Object.defineProperties(ReadableStreamDefaultReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n });\n setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\n setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\n setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultReader',\n configurable: true\n });\n }\n // Abstract operations for the readers.\n function IsReadableStreamDefaultReader(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n return false;\n }\n return x instanceof ReadableStreamDefaultReader;\n }\n function ReadableStreamDefaultReaderRead(reader, readRequest) {\n const stream = reader._ownerReadableStream;\n stream._disturbed = true;\n if (stream._state === 'closed') {\n readRequest._closeSteps();\n }\n else if (stream._state === 'errored') {\n readRequest._errorSteps(stream._storedError);\n }\n else {\n stream._readableStreamController[PullSteps](readRequest);\n }\n }\n function ReadableStreamDefaultReaderRelease(reader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n }\n function ReadableStreamDefaultReaderErrorReadRequests(reader, e) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._errorSteps(e);\n });\n }\n // Helper functions for the ReadableStreamDefaultReader.\n function defaultReaderBrandCheckException(name) {\n return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n }\n\n /// \n /* eslint-disable @typescript-eslint/no-empty-function */\n const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype);\n\n /// \n class ReadableStreamAsyncIteratorImpl {\n constructor(reader, preventCancel) {\n this._ongoingPromise = undefined;\n this._isFinished = false;\n this._reader = reader;\n this._preventCancel = preventCancel;\n }\n next() {\n const nextSteps = () => this._nextSteps();\n this._ongoingPromise = this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n nextSteps();\n return this._ongoingPromise;\n }\n return(value) {\n const returnSteps = () => this._returnSteps(value);\n return this._ongoingPromise ?\n transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n returnSteps();\n }\n _nextSteps() {\n if (this._isFinished) {\n return Promise.resolve({ value: undefined, done: true });\n }\n const reader = this._reader;\n let resolvePromise;\n let rejectPromise;\n const promise = newPromise((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readRequest = {\n _chunkSteps: chunk => {\n this._ongoingPromise = undefined;\n // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n // FIXME Is this a bug in the specification, or in the test?\n _queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n },\n _closeSteps: () => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n resolvePromise({ value: undefined, done: true });\n },\n _errorSteps: reason => {\n this._ongoingPromise = undefined;\n this._isFinished = true;\n ReadableStreamReaderGenericRelease(reader);\n rejectPromise(reason);\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promise;\n }\n _returnSteps(value) {\n if (this._isFinished) {\n return Promise.resolve({ value, done: true });\n }\n this._isFinished = true;\n const reader = this._reader;\n if (!this._preventCancel) {\n const result = ReadableStreamReaderGenericCancel(reader, value);\n ReadableStreamReaderGenericRelease(reader);\n return transformPromiseWith(result, () => ({ value, done: true }));\n }\n ReadableStreamReaderGenericRelease(reader);\n return promiseResolvedWith({ value, done: true });\n }\n }\n const ReadableStreamAsyncIteratorPrototype = {\n next() {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n }\n return this._asyncIteratorImpl.next();\n },\n return(value) {\n if (!IsReadableStreamAsyncIterator(this)) {\n return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n }\n return this._asyncIteratorImpl.return(value);\n }\n };\n Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n // Abstract operations for the ReadableStream.\n function AcquireReadableStreamAsyncIterator(stream, preventCancel) {\n const reader = AcquireReadableStreamDefaultReader(stream);\n const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);\n iterator._asyncIteratorImpl = impl;\n return iterator;\n }\n function IsReadableStreamAsyncIterator(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n return false;\n }\n try {\n // noinspection SuspiciousTypeOfGuard\n return x._asyncIteratorImpl instanceof\n ReadableStreamAsyncIteratorImpl;\n }\n catch (_a) {\n return false;\n }\n }\n // Helper functions for the ReadableStream.\n function streamAsyncIteratorBrandCheckException(name) {\n return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n }\n\n /// \n // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\n const NumberIsNaN = Number.isNaN || function (x) {\n // eslint-disable-next-line no-self-compare\n return x !== x;\n };\n\n var _a, _b, _c;\n function CreateArrayFromList(elements) {\n // We use arrays to represent lists, so this is basically a no-op.\n // Do a slice though just in case we happen to depend on the unique-ness.\n return elements.slice();\n }\n function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) {\n new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n }\n let TransferArrayBuffer = (O) => {\n if (typeof O.transfer === 'function') {\n TransferArrayBuffer = buffer => buffer.transfer();\n }\n else if (typeof structuredClone === 'function') {\n TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n }\n else {\n // Not implemented correctly\n TransferArrayBuffer = buffer => buffer;\n }\n return TransferArrayBuffer(O);\n };\n let IsDetachedBuffer = (O) => {\n if (typeof O.detached === 'boolean') {\n IsDetachedBuffer = buffer => buffer.detached;\n }\n else {\n // Not implemented correctly\n IsDetachedBuffer = buffer => buffer.byteLength === 0;\n }\n return IsDetachedBuffer(O);\n };\n function ArrayBufferSlice(buffer, begin, end) {\n // ArrayBuffer.prototype.slice is not available on IE10\n // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n if (buffer.slice) {\n return buffer.slice(begin, end);\n }\n const length = end - begin;\n const slice = new ArrayBuffer(length);\n CopyDataBlockBytes(slice, 0, buffer, begin, length);\n return slice;\n }\n function GetMethod(receiver, prop) {\n const func = receiver[prop];\n if (func === undefined || func === null) {\n return undefined;\n }\n if (typeof func !== 'function') {\n throw new TypeError(`${String(prop)} is not a function`);\n }\n return func;\n }\n function CreateAsyncFromSyncIterator(syncIteratorRecord) {\n // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n // we use yield* inside an async generator function to achieve the same result.\n // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n const syncIterable = {\n [Symbol.iterator]: () => syncIteratorRecord.iterator\n };\n // Create an async generator function and immediately invoke it.\n const asyncIterator = (async function* () {\n return yield* syncIterable;\n }());\n // Return as an async iterator record.\n const nextMethod = asyncIterator.next;\n return { iterator: asyncIterator, nextMethod, done: false };\n }\n // Aligns with core-js/modules/es.symbol.async-iterator.js\n const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator';\n function GetIterator(obj, hint = 'sync', method) {\n if (method === undefined) {\n if (hint === 'async') {\n method = GetMethod(obj, SymbolAsyncIterator);\n if (method === undefined) {\n const syncMethod = GetMethod(obj, Symbol.iterator);\n const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod);\n return CreateAsyncFromSyncIterator(syncIteratorRecord);\n }\n }\n else {\n method = GetMethod(obj, Symbol.iterator);\n }\n }\n if (method === undefined) {\n throw new TypeError('The object is not iterable');\n }\n const iterator = reflectCall(method, obj, []);\n if (!typeIsObject(iterator)) {\n throw new TypeError('The iterator method must return an object');\n }\n const nextMethod = iterator.next;\n return { iterator, nextMethod, done: false };\n }\n function IteratorNext(iteratorRecord) {\n const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n if (!typeIsObject(result)) {\n throw new TypeError('The iterator.next() method must return an object');\n }\n return result;\n }\n function IteratorComplete(iterResult) {\n return Boolean(iterResult.done);\n }\n function IteratorValue(iterResult) {\n return iterResult.value;\n }\n\n function IsNonNegativeNumber(v) {\n if (typeof v !== 'number') {\n return false;\n }\n if (NumberIsNaN(v)) {\n return false;\n }\n if (v < 0) {\n return false;\n }\n return true;\n }\n function CloneAsUint8Array(O) {\n const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n return new Uint8Array(buffer);\n }\n\n function DequeueValue(container) {\n const pair = container._queue.shift();\n container._queueTotalSize -= pair.size;\n if (container._queueTotalSize < 0) {\n container._queueTotalSize = 0;\n }\n return pair.value;\n }\n function EnqueueValueWithSize(container, value, size) {\n if (!IsNonNegativeNumber(size) || size === Infinity) {\n throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n }\n container._queue.push({ value, size });\n container._queueTotalSize += size;\n }\n function PeekQueueValue(container) {\n const pair = container._queue.peek();\n return pair.value;\n }\n function ResetQueue(container) {\n container._queue = new SimpleQueue();\n container._queueTotalSize = 0;\n }\n\n function isDataViewConstructor(ctor) {\n return ctor === DataView;\n }\n function isDataView(view) {\n return isDataViewConstructor(view.constructor);\n }\n function arrayBufferViewElementSize(ctor) {\n if (isDataViewConstructor(ctor)) {\n return 1;\n }\n return ctor.BYTES_PER_ELEMENT;\n }\n\n /**\n * A pull-into request in a {@link ReadableByteStreamController}.\n *\n * @public\n */\n class ReadableStreamBYOBRequest {\n constructor() {\n throw new TypeError('Illegal constructor');\n }\n /**\n * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n */\n get view() {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('view');\n }\n return this._view;\n }\n respond(bytesWritten) {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respond');\n }\n assertRequiredArgument(bytesWritten, 1, 'respond');\n bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n if (IsDetachedBuffer(this._view.buffer)) {\n throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n }\n ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n }\n respondWithNewView(view) {\n if (!IsReadableStreamBYOBRequest(this)) {\n throw byobRequestBrandCheckException('respondWithNewView');\n }\n assertRequiredArgument(view, 1, 'respondWithNewView');\n if (!ArrayBuffer.isView(view)) {\n throw new TypeError('You can only respond with array buffer views');\n }\n if (this._associatedReadableByteStreamController === undefined) {\n throw new TypeError('This BYOB request has been invalidated');\n }\n if (IsDetachedBuffer(view.buffer)) {\n throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n }\n ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n }\n }\n Object.defineProperties(ReadableStreamBYOBRequest.prototype, {\n respond: { enumerable: true },\n respondWithNewView: { enumerable: true },\n view: { enumerable: true }\n });\n setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\n setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBRequest',\n configurable: true\n });\n }\n /**\n * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n *\n * @public\n */\n class ReadableByteStreamController {\n constructor() {\n throw new TypeError('Illegal constructor');\n }\n /**\n * Returns the current BYOB pull request, or `null` if there isn't one.\n */\n get byobRequest() {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('byobRequest');\n }\n return ReadableByteStreamControllerGetBYOBRequest(this);\n }\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize() {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('desiredSize');\n }\n return ReadableByteStreamControllerGetDesiredSize(this);\n }\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close() {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('close');\n }\n if (this._closeRequested) {\n throw new TypeError('The stream has already been closed; do not close it again!');\n }\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n }\n ReadableByteStreamControllerClose(this);\n }\n enqueue(chunk) {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('enqueue');\n }\n assertRequiredArgument(chunk, 1, 'enqueue');\n if (!ArrayBuffer.isView(chunk)) {\n throw new TypeError('chunk must be an array buffer view');\n }\n if (chunk.byteLength === 0) {\n throw new TypeError('chunk must have non-zero byteLength');\n }\n if (chunk.buffer.byteLength === 0) {\n throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n }\n if (this._closeRequested) {\n throw new TypeError('stream is closed or draining');\n }\n const state = this._controlledReadableByteStream._state;\n if (state !== 'readable') {\n throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n }\n ReadableByteStreamControllerEnqueue(this, chunk);\n }\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e = undefined) {\n if (!IsReadableByteStreamController(this)) {\n throw byteStreamControllerBrandCheckException('error');\n }\n ReadableByteStreamControllerError(this, e);\n }\n /** @internal */\n [CancelSteps](reason) {\n ReadableByteStreamControllerClearPendingPullIntos(this);\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableByteStreamControllerClearAlgorithms(this);\n return result;\n }\n /** @internal */\n [PullSteps](readRequest) {\n const stream = this._controlledReadableByteStream;\n if (this._queueTotalSize > 0) {\n ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n return;\n }\n const autoAllocateChunkSize = this._autoAllocateChunkSize;\n if (autoAllocateChunkSize !== undefined) {\n let buffer;\n try {\n buffer = new ArrayBuffer(autoAllocateChunkSize);\n }\n catch (bufferE) {\n readRequest._errorSteps(bufferE);\n return;\n }\n const pullIntoDescriptor = {\n buffer,\n bufferByteLength: autoAllocateChunkSize,\n byteOffset: 0,\n byteLength: autoAllocateChunkSize,\n bytesFilled: 0,\n minimumFill: 1,\n elementSize: 1,\n viewConstructor: Uint8Array,\n readerType: 'default'\n };\n this._pendingPullIntos.push(pullIntoDescriptor);\n }\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableByteStreamControllerCallPullIfNeeded(this);\n }\n /** @internal */\n [ReleaseSteps]() {\n if (this._pendingPullIntos.length > 0) {\n const firstPullInto = this._pendingPullIntos.peek();\n firstPullInto.readerType = 'none';\n this._pendingPullIntos = new SimpleQueue();\n this._pendingPullIntos.push(firstPullInto);\n }\n }\n }\n Object.defineProperties(ReadableByteStreamController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n byobRequest: { enumerable: true },\n desiredSize: { enumerable: true }\n });\n setFunctionName(ReadableByteStreamController.prototype.close, 'close');\n setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\n setFunctionName(ReadableByteStreamController.prototype.error, 'error');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n value: 'ReadableByteStreamController',\n configurable: true\n });\n }\n // Abstract operations for the ReadableByteStreamController.\n function IsReadableByteStreamController(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n return false;\n }\n return x instanceof ReadableByteStreamController;\n }\n function IsReadableStreamBYOBRequest(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n return false;\n }\n return x instanceof ReadableStreamBYOBRequest;\n }\n function ReadableByteStreamControllerCallPullIfNeeded(controller) {\n const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n controller._pulling = true;\n // TODO: Test controller argument\n const pullPromise = controller._pullAlgorithm();\n uponPromise(pullPromise, () => {\n controller._pulling = false;\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n return null;\n }, e => {\n ReadableByteStreamControllerError(controller, e);\n return null;\n });\n }\n function ReadableByteStreamControllerClearPendingPullIntos(controller) {\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n controller._pendingPullIntos = new SimpleQueue();\n }\n function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {\n let done = false;\n if (stream._state === 'closed') {\n done = true;\n }\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'default') {\n ReadableStreamFulfillReadRequest(stream, filledView, done);\n }\n else {\n ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n }\n }\n function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {\n const bytesFilled = pullIntoDescriptor.bytesFilled;\n const elementSize = pullIntoDescriptor.elementSize;\n return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);\n }\n function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {\n controller._queue.push({ buffer, byteOffset, byteLength });\n controller._queueTotalSize += byteLength;\n }\n function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) {\n let clonedChunk;\n try {\n clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n }\n catch (cloneE) {\n ReadableByteStreamControllerError(controller, cloneE);\n throw cloneE;\n }\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n }\n function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) {\n if (firstDescriptor.bytesFilled > 0) {\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled);\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {\n const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n let totalBytesToCopyRemaining = maxBytesToCopy;\n let ready = false;\n const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n const maxAlignedBytes = maxBytesFilled - remainderBytes;\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n ready = true;\n }\n const queue = controller._queue;\n while (totalBytesToCopyRemaining > 0) {\n const headOfQueue = queue.peek();\n const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n if (headOfQueue.byteLength === bytesToCopy) {\n queue.shift();\n }\n else {\n headOfQueue.byteOffset += bytesToCopy;\n headOfQueue.byteLength -= bytesToCopy;\n }\n controller._queueTotalSize -= bytesToCopy;\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n totalBytesToCopyRemaining -= bytesToCopy;\n }\n return ready;\n }\n function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {\n pullIntoDescriptor.bytesFilled += size;\n }\n function ReadableByteStreamControllerHandleQueueDrain(controller) {\n if (controller._queueTotalSize === 0 && controller._closeRequested) {\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(controller._controlledReadableByteStream);\n }\n else {\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n }\n function ReadableByteStreamControllerInvalidateBYOBRequest(controller) {\n if (controller._byobRequest === null) {\n return;\n }\n controller._byobRequest._associatedReadableByteStreamController = undefined;\n controller._byobRequest._view = null;\n controller._byobRequest = null;\n }\n function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {\n while (controller._pendingPullIntos.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const pullIntoDescriptor = controller._pendingPullIntos.peek();\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n }\n }\n }\n function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) {\n const reader = controller._controlledReadableByteStream._reader;\n while (reader._readRequests.length > 0) {\n if (controller._queueTotalSize === 0) {\n return;\n }\n const readRequest = reader._readRequests.shift();\n ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n }\n }\n function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) {\n const stream = controller._controlledReadableByteStream;\n const ctor = view.constructor;\n const elementSize = arrayBufferViewElementSize(ctor);\n const { byteOffset, byteLength } = view;\n const minimumFill = min * elementSize;\n let buffer;\n try {\n buffer = TransferArrayBuffer(view.buffer);\n }\n catch (e) {\n readIntoRequest._errorSteps(e);\n return;\n }\n const pullIntoDescriptor = {\n buffer,\n bufferByteLength: buffer.byteLength,\n byteOffset,\n byteLength,\n bytesFilled: 0,\n minimumFill,\n elementSize,\n viewConstructor: ctor,\n readerType: 'byob'\n };\n if (controller._pendingPullIntos.length > 0) {\n controller._pendingPullIntos.push(pullIntoDescriptor);\n // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n // - No change happens on desiredSize\n // - The source has already been notified of that there's at least 1 pending read(view)\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n return;\n }\n if (stream._state === 'closed') {\n const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n readIntoRequest._closeSteps(emptyView);\n return;\n }\n if (controller._queueTotalSize > 0) {\n if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n ReadableByteStreamControllerHandleQueueDrain(controller);\n readIntoRequest._chunkSteps(filledView);\n return;\n }\n if (controller._closeRequested) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n readIntoRequest._errorSteps(e);\n return;\n }\n }\n controller._pendingPullIntos.push(pullIntoDescriptor);\n ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {\n if (firstDescriptor.readerType === 'none') {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const stream = controller._controlledReadableByteStream;\n if (ReadableStreamHasBYOBReader(stream)) {\n while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n }\n }\n }\n function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {\n ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n if (pullIntoDescriptor.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n return;\n }\n if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n // of the queue, so the underlying source can keep filling it.\n return;\n }\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n if (remainderSize > 0) {\n const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize);\n }\n pullIntoDescriptor.bytesFilled -= remainderSize;\n ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n }\n function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n }\n else {\n ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n }\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n function ReadableByteStreamControllerShiftPendingPullInto(controller) {\n const descriptor = controller._pendingPullIntos.shift();\n return descriptor;\n }\n function ReadableByteStreamControllerShouldCallPull(controller) {\n const stream = controller._controlledReadableByteStream;\n if (stream._state !== 'readable') {\n return false;\n }\n if (controller._closeRequested) {\n return false;\n }\n if (!controller._started) {\n return false;\n }\n if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n return true;\n }\n const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n if (desiredSize > 0) {\n return true;\n }\n return false;\n }\n function ReadableByteStreamControllerClearAlgorithms(controller) {\n controller._pullAlgorithm = undefined;\n controller._cancelAlgorithm = undefined;\n }\n // A client of ReadableByteStreamController may use these functions directly to bypass state check.\n function ReadableByteStreamControllerClose(controller) {\n const stream = controller._controlledReadableByteStream;\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n if (controller._queueTotalSize > 0) {\n controller._closeRequested = true;\n return;\n }\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n ReadableByteStreamControllerError(controller, e);\n throw e;\n }\n }\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n function ReadableByteStreamControllerEnqueue(controller, chunk) {\n const stream = controller._controlledReadableByteStream;\n if (controller._closeRequested || stream._state !== 'readable') {\n return;\n }\n const { buffer, byteOffset, byteLength } = chunk;\n if (IsDetachedBuffer(buffer)) {\n throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n }\n const transferredBuffer = TransferArrayBuffer(buffer);\n if (controller._pendingPullIntos.length > 0) {\n const firstPendingPullInto = controller._pendingPullIntos.peek();\n if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n throw new TypeError('The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk');\n }\n ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n if (firstPendingPullInto.readerType === 'none') {\n ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n }\n }\n if (ReadableStreamHasDefaultReader(stream)) {\n ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n if (ReadableStreamGetNumReadRequests(stream) === 0) {\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n else {\n if (controller._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerShiftPendingPullInto(controller);\n }\n const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n ReadableStreamFulfillReadRequest(stream, transferredView, false);\n }\n }\n else if (ReadableStreamHasBYOBReader(stream)) {\n // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n }\n else {\n ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n }\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n }\n function ReadableByteStreamControllerError(controller, e) {\n const stream = controller._controlledReadableByteStream;\n if (stream._state !== 'readable') {\n return;\n }\n ReadableByteStreamControllerClearPendingPullIntos(controller);\n ResetQueue(controller);\n ReadableByteStreamControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n }\n function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) {\n const entry = controller._queue.shift();\n controller._queueTotalSize -= entry.byteLength;\n ReadableByteStreamControllerHandleQueueDrain(controller);\n const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n readRequest._chunkSteps(view);\n }\n function ReadableByteStreamControllerGetBYOBRequest(controller) {\n if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n SetUpReadableStreamBYOBRequest(byobRequest, controller, view);\n controller._byobRequest = byobRequest;\n }\n return controller._byobRequest;\n }\n function ReadableByteStreamControllerGetDesiredSize(controller) {\n const state = controller._controlledReadableByteStream._state;\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n return controller._strategyHWM - controller._queueTotalSize;\n }\n function ReadableByteStreamControllerRespond(controller, bytesWritten) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n if (bytesWritten !== 0) {\n throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n }\n }\n else {\n if (bytesWritten === 0) {\n throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n }\n if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n throw new RangeError('bytesWritten out of range');\n }\n }\n firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n }\n function ReadableByteStreamControllerRespondWithNewView(controller, view) {\n const firstDescriptor = controller._pendingPullIntos.peek();\n const state = controller._controlledReadableByteStream._state;\n if (state === 'closed') {\n if (view.byteLength !== 0) {\n throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n }\n }\n else {\n if (view.byteLength === 0) {\n throw new TypeError('The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream');\n }\n }\n if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n throw new RangeError('The region specified by view does not match byobRequest');\n }\n if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n throw new RangeError('The buffer of view has different capacity than byobRequest');\n }\n if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n throw new RangeError('The region specified by view is larger than byobRequest');\n }\n const viewByteLength = view.byteLength;\n firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n }\n function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) {\n controller._controlledReadableByteStream = stream;\n controller._pullAgain = false;\n controller._pulling = false;\n controller._byobRequest = null;\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = controller._queueTotalSize = undefined;\n ResetQueue(controller);\n controller._closeRequested = false;\n controller._started = false;\n controller._strategyHWM = highWaterMark;\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n controller._autoAllocateChunkSize = autoAllocateChunkSize;\n controller._pendingPullIntos = new SimpleQueue();\n stream._readableStreamController = controller;\n const startResult = startAlgorithm();\n uponPromise(promiseResolvedWith(startResult), () => {\n controller._started = true;\n ReadableByteStreamControllerCallPullIfNeeded(controller);\n return null;\n }, r => {\n ReadableByteStreamControllerError(controller, r);\n return null;\n });\n }\n function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) {\n const controller = Object.create(ReadableByteStreamController.prototype);\n let startAlgorithm;\n let pullAlgorithm;\n let cancelAlgorithm;\n if (underlyingByteSource.start !== undefined) {\n startAlgorithm = () => underlyingByteSource.start(controller);\n }\n else {\n startAlgorithm = () => undefined;\n }\n if (underlyingByteSource.pull !== undefined) {\n pullAlgorithm = () => underlyingByteSource.pull(controller);\n }\n else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingByteSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingByteSource.cancel(reason);\n }\n else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n if (autoAllocateChunkSize === 0) {\n throw new TypeError('autoAllocateChunkSize must be greater than 0');\n }\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize);\n }\n function SetUpReadableStreamBYOBRequest(request, controller, view) {\n request._associatedReadableByteStreamController = controller;\n request._view = view;\n }\n // Helper functions for the ReadableStreamBYOBRequest.\n function byobRequestBrandCheckException(name) {\n return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n }\n // Helper functions for the ReadableByteStreamController.\n function byteStreamControllerBrandCheckException(name) {\n return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n }\n\n function convertReaderOptions(options, context) {\n assertDictionary(options, context);\n const mode = options === null || options === void 0 ? void 0 : options.mode;\n return {\n mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n };\n }\n function convertReadableStreamReaderMode(mode, context) {\n mode = `${mode}`;\n if (mode !== 'byob') {\n throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n }\n return mode;\n }\n function convertByobReadOptions(options, context) {\n var _a;\n assertDictionary(options, context);\n const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1;\n return {\n min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`)\n };\n }\n\n // Abstract operations for the ReadableStream.\n function AcquireReadableStreamBYOBReader(stream) {\n return new ReadableStreamBYOBReader(stream);\n }\n // ReadableStream API exposed for controllers.\n function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) {\n stream._reader._readIntoRequests.push(readIntoRequest);\n }\n function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) {\n const reader = stream._reader;\n const readIntoRequest = reader._readIntoRequests.shift();\n if (done) {\n readIntoRequest._closeSteps(chunk);\n }\n else {\n readIntoRequest._chunkSteps(chunk);\n }\n }\n function ReadableStreamGetNumReadIntoRequests(stream) {\n return stream._reader._readIntoRequests.length;\n }\n function ReadableStreamHasBYOBReader(stream) {\n const reader = stream._reader;\n if (reader === undefined) {\n return false;\n }\n if (!IsReadableStreamBYOBReader(reader)) {\n return false;\n }\n return true;\n }\n /**\n * A BYOB reader vended by a {@link ReadableStream}.\n *\n * @public\n */\n class ReadableStreamBYOBReader {\n constructor(stream) {\n assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n assertReadableStream(stream, 'First parameter');\n if (IsReadableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n }\n if (!IsReadableByteStreamController(stream._readableStreamController)) {\n throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n 'source');\n }\n ReadableStreamReaderGenericInitialize(this, stream);\n this._readIntoRequests = new SimpleQueue();\n }\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the reader's lock is released before the stream finishes closing.\n */\n get closed() {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n }\n return this._closedPromise;\n }\n /**\n * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n */\n cancel(reason = undefined) {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n }\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('cancel'));\n }\n return ReadableStreamReaderGenericCancel(this, reason);\n }\n read(view, rawOptions = {}) {\n if (!IsReadableStreamBYOBReader(this)) {\n return promiseRejectedWith(byobReaderBrandCheckException('read'));\n }\n if (!ArrayBuffer.isView(view)) {\n return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n }\n if (view.byteLength === 0) {\n return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n }\n if (view.buffer.byteLength === 0) {\n return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n }\n if (IsDetachedBuffer(view.buffer)) {\n return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n }\n let options;\n try {\n options = convertByobReadOptions(rawOptions, 'options');\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n const min = options.min;\n if (min === 0) {\n return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n }\n if (!isDataView(view)) {\n if (min > view.length) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n }\n }\n else if (min > view.byteLength) {\n return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n }\n if (this._ownerReadableStream === undefined) {\n return promiseRejectedWith(readerLockException('read from'));\n }\n let resolvePromise;\n let rejectPromise;\n const promise = newPromise((resolve, reject) => {\n resolvePromise = resolve;\n rejectPromise = reject;\n });\n const readIntoRequest = {\n _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n _errorSteps: e => rejectPromise(e)\n };\n ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n return promise;\n }\n /**\n * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n * from now on; otherwise, the reader will appear closed.\n *\n * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n * do so will throw a `TypeError` and leave the reader locked to the stream.\n */\n releaseLock() {\n if (!IsReadableStreamBYOBReader(this)) {\n throw byobReaderBrandCheckException('releaseLock');\n }\n if (this._ownerReadableStream === undefined) {\n return;\n }\n ReadableStreamBYOBReaderRelease(this);\n }\n }\n Object.defineProperties(ReadableStreamBYOBReader.prototype, {\n cancel: { enumerable: true },\n read: { enumerable: true },\n releaseLock: { enumerable: true },\n closed: { enumerable: true }\n });\n setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\n setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\n setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamBYOBReader',\n configurable: true\n });\n }\n // Abstract operations for the readers.\n function IsReadableStreamBYOBReader(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n return false;\n }\n return x instanceof ReadableStreamBYOBReader;\n }\n function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) {\n const stream = reader._ownerReadableStream;\n stream._disturbed = true;\n if (stream._state === 'errored') {\n readIntoRequest._errorSteps(stream._storedError);\n }\n else {\n ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest);\n }\n }\n function ReadableStreamBYOBReaderRelease(reader) {\n ReadableStreamReaderGenericRelease(reader);\n const e = new TypeError('Reader was released');\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._errorSteps(e);\n });\n }\n // Helper functions for the ReadableStreamBYOBReader.\n function byobReaderBrandCheckException(name) {\n return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n }\n\n function ExtractHighWaterMark(strategy, defaultHWM) {\n const { highWaterMark } = strategy;\n if (highWaterMark === undefined) {\n return defaultHWM;\n }\n if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n throw new RangeError('Invalid highWaterMark');\n }\n return highWaterMark;\n }\n function ExtractSizeAlgorithm(strategy) {\n const { size } = strategy;\n if (!size) {\n return () => 1;\n }\n return size;\n }\n\n function convertQueuingStrategy(init, context) {\n assertDictionary(init, context);\n const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;\n const size = init === null || init === void 0 ? void 0 : init.size;\n return {\n highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n };\n }\n function convertQueuingStrategySize(fn, context) {\n assertFunction(fn, context);\n return chunk => convertUnrestrictedDouble(fn(chunk));\n }\n\n function convertUnderlyingSink(original, context) {\n assertDictionary(original, context);\n const abort = original === null || original === void 0 ? void 0 : original.abort;\n const close = original === null || original === void 0 ? void 0 : original.close;\n const start = original === null || original === void 0 ? void 0 : original.start;\n const type = original === null || original === void 0 ? void 0 : original.type;\n const write = original === null || original === void 0 ? void 0 : original.write;\n return {\n abort: abort === undefined ?\n undefined :\n convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`),\n close: close === undefined ?\n undefined :\n convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`),\n write: write === undefined ?\n undefined :\n convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`),\n type\n };\n }\n function convertUnderlyingSinkAbortCallback(fn, original, context) {\n assertFunction(fn, context);\n return (reason) => promiseCall(fn, original, [reason]);\n }\n function convertUnderlyingSinkCloseCallback(fn, original, context) {\n assertFunction(fn, context);\n return () => promiseCall(fn, original, []);\n }\n function convertUnderlyingSinkStartCallback(fn, original, context) {\n assertFunction(fn, context);\n return (controller) => reflectCall(fn, original, [controller]);\n }\n function convertUnderlyingSinkWriteCallback(fn, original, context) {\n assertFunction(fn, context);\n return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);\n }\n\n function assertWritableStream(x, context) {\n if (!IsWritableStream(x)) {\n throw new TypeError(`${context} is not a WritableStream.`);\n }\n }\n\n function isAbortSignal(value) {\n if (typeof value !== 'object' || value === null) {\n return false;\n }\n try {\n return typeof value.aborted === 'boolean';\n }\n catch (_a) {\n // AbortSignal.prototype.aborted throws if its brand check fails\n return false;\n }\n }\n const supportsAbortController = typeof AbortController === 'function';\n /**\n * Construct a new AbortController, if supported by the platform.\n *\n * @internal\n */\n function createAbortController() {\n if (supportsAbortController) {\n return new AbortController();\n }\n return undefined;\n }\n\n /**\n * A writable stream represents a destination for data, into which you can write.\n *\n * @public\n */\n class WritableStream {\n constructor(rawUnderlyingSink = {}, rawStrategy = {}) {\n if (rawUnderlyingSink === undefined) {\n rawUnderlyingSink = null;\n }\n else {\n assertObject(rawUnderlyingSink, 'First parameter');\n }\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n InitializeWritableStream(this);\n const type = underlyingSink.type;\n if (type !== undefined) {\n throw new RangeError('Invalid type is specified');\n }\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n }\n /**\n * Returns whether or not the writable stream is locked to a writer.\n */\n get locked() {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException$2('locked');\n }\n return IsWritableStreamLocked(this);\n }\n /**\n * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n * mechanism of the underlying sink.\n *\n * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n * the stream) if the stream is currently locked.\n */\n abort(reason = undefined) {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException$2('abort'));\n }\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n }\n return WritableStreamAbort(this, reason);\n }\n /**\n * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n *\n * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n */\n close() {\n if (!IsWritableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException$2('close'));\n }\n if (IsWritableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n }\n if (WritableStreamCloseQueuedOrInFlight(this)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n return WritableStreamClose(this);\n }\n /**\n * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n * is locked, no other writer can be acquired until this one is released.\n *\n * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n */\n getWriter() {\n if (!IsWritableStream(this)) {\n throw streamBrandCheckException$2('getWriter');\n }\n return AcquireWritableStreamDefaultWriter(this);\n }\n }\n Object.defineProperties(WritableStream.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n getWriter: { enumerable: true },\n locked: { enumerable: true }\n });\n setFunctionName(WritableStream.prototype.abort, 'abort');\n setFunctionName(WritableStream.prototype.close, 'close');\n setFunctionName(WritableStream.prototype.getWriter, 'getWriter');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n value: 'WritableStream',\n configurable: true\n });\n }\n // Abstract operations for the WritableStream.\n function AcquireWritableStreamDefaultWriter(stream) {\n return new WritableStreamDefaultWriter(stream);\n }\n // Throws if and only if startAlgorithm throws.\n function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {\n const stream = Object.create(WritableStream.prototype);\n InitializeWritableStream(stream);\n const controller = Object.create(WritableStreamDefaultController.prototype);\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n }\n function InitializeWritableStream(stream) {\n stream._state = 'writable';\n // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n // 'erroring' or 'errored'. May be set to an undefined value.\n stream._storedError = undefined;\n stream._writer = undefined;\n // Initialize to undefined first because the constructor of the controller checks this\n // variable to validate the caller.\n stream._writableStreamController = undefined;\n // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n // producer without waiting for the queued writes to finish.\n stream._writeRequests = new SimpleQueue();\n // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n stream._inFlightWriteRequest = undefined;\n // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n // has been detached.\n stream._closeRequest = undefined;\n // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n stream._inFlightCloseRequest = undefined;\n // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n stream._pendingAbortRequest = undefined;\n // The backpressure signal set by the controller.\n stream._backpressure = false;\n }\n function IsWritableStream(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n return false;\n }\n return x instanceof WritableStream;\n }\n function IsWritableStreamLocked(stream) {\n if (stream._writer === undefined) {\n return false;\n }\n return true;\n }\n function WritableStreamAbort(stream, reason) {\n var _a;\n if (stream._state === 'closed' || stream._state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n stream._writableStreamController._abortReason = reason;\n (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason);\n // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n // but it doesn't know that signaling abort runs author code that might have changed the state.\n // Widen the type again by casting to WritableStreamState.\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseResolvedWith(undefined);\n }\n if (stream._pendingAbortRequest !== undefined) {\n return stream._pendingAbortRequest._promise;\n }\n let wasAlreadyErroring = false;\n if (state === 'erroring') {\n wasAlreadyErroring = true;\n // reason will not be used, so don't keep a reference to it.\n reason = undefined;\n }\n const promise = newPromise((resolve, reject) => {\n stream._pendingAbortRequest = {\n _promise: undefined,\n _resolve: resolve,\n _reject: reject,\n _reason: reason,\n _wasAlreadyErroring: wasAlreadyErroring\n };\n });\n stream._pendingAbortRequest._promise = promise;\n if (!wasAlreadyErroring) {\n WritableStreamStartErroring(stream, reason);\n }\n return promise;\n }\n function WritableStreamClose(stream) {\n const state = stream._state;\n if (state === 'closed' || state === 'errored') {\n return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`));\n }\n const promise = newPromise((resolve, reject) => {\n const closeRequest = {\n _resolve: resolve,\n _reject: reject\n };\n stream._closeRequest = closeRequest;\n });\n const writer = stream._writer;\n if (writer !== undefined && stream._backpressure && state === 'writable') {\n defaultWriterReadyPromiseResolve(writer);\n }\n WritableStreamDefaultControllerClose(stream._writableStreamController);\n return promise;\n }\n // WritableStream API exposed for controllers.\n function WritableStreamAddWriteRequest(stream) {\n const promise = newPromise((resolve, reject) => {\n const writeRequest = {\n _resolve: resolve,\n _reject: reject\n };\n stream._writeRequests.push(writeRequest);\n });\n return promise;\n }\n function WritableStreamDealWithRejection(stream, error) {\n const state = stream._state;\n if (state === 'writable') {\n WritableStreamStartErroring(stream, error);\n return;\n }\n WritableStreamFinishErroring(stream);\n }\n function WritableStreamStartErroring(stream, reason) {\n const controller = stream._writableStreamController;\n stream._state = 'erroring';\n stream._storedError = reason;\n const writer = stream._writer;\n if (writer !== undefined) {\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n }\n if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n WritableStreamFinishErroring(stream);\n }\n }\n function WritableStreamFinishErroring(stream) {\n stream._state = 'errored';\n stream._writableStreamController[ErrorSteps]();\n const storedError = stream._storedError;\n stream._writeRequests.forEach(writeRequest => {\n writeRequest._reject(storedError);\n });\n stream._writeRequests = new SimpleQueue();\n if (stream._pendingAbortRequest === undefined) {\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n const abortRequest = stream._pendingAbortRequest;\n stream._pendingAbortRequest = undefined;\n if (abortRequest._wasAlreadyErroring) {\n abortRequest._reject(storedError);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return;\n }\n const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n uponPromise(promise, () => {\n abortRequest._resolve();\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n }, (reason) => {\n abortRequest._reject(reason);\n WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n return null;\n });\n }\n function WritableStreamFinishInFlightWrite(stream) {\n stream._inFlightWriteRequest._resolve(undefined);\n stream._inFlightWriteRequest = undefined;\n }\n function WritableStreamFinishInFlightWriteWithError(stream, error) {\n stream._inFlightWriteRequest._reject(error);\n stream._inFlightWriteRequest = undefined;\n WritableStreamDealWithRejection(stream, error);\n }\n function WritableStreamFinishInFlightClose(stream) {\n stream._inFlightCloseRequest._resolve(undefined);\n stream._inFlightCloseRequest = undefined;\n const state = stream._state;\n if (state === 'erroring') {\n // The error was too late to do anything, so it is ignored.\n stream._storedError = undefined;\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._resolve();\n stream._pendingAbortRequest = undefined;\n }\n }\n stream._state = 'closed';\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseResolve(writer);\n }\n }\n function WritableStreamFinishInFlightCloseWithError(stream, error) {\n stream._inFlightCloseRequest._reject(error);\n stream._inFlightCloseRequest = undefined;\n // Never execute sink abort() after sink close().\n if (stream._pendingAbortRequest !== undefined) {\n stream._pendingAbortRequest._reject(error);\n stream._pendingAbortRequest = undefined;\n }\n WritableStreamDealWithRejection(stream, error);\n }\n // TODO(ricea): Fix alphabetical order.\n function WritableStreamCloseQueuedOrInFlight(stream) {\n if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n return true;\n }\n function WritableStreamHasOperationMarkedInFlight(stream) {\n if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n return false;\n }\n return true;\n }\n function WritableStreamMarkCloseRequestInFlight(stream) {\n stream._inFlightCloseRequest = stream._closeRequest;\n stream._closeRequest = undefined;\n }\n function WritableStreamMarkFirstWriteRequestInFlight(stream) {\n stream._inFlightWriteRequest = stream._writeRequests.shift();\n }\n function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {\n if (stream._closeRequest !== undefined) {\n stream._closeRequest._reject(stream._storedError);\n stream._closeRequest = undefined;\n }\n const writer = stream._writer;\n if (writer !== undefined) {\n defaultWriterClosedPromiseReject(writer, stream._storedError);\n }\n }\n function WritableStreamUpdateBackpressure(stream, backpressure) {\n const writer = stream._writer;\n if (writer !== undefined && backpressure !== stream._backpressure) {\n if (backpressure) {\n defaultWriterReadyPromiseReset(writer);\n }\n else {\n defaultWriterReadyPromiseResolve(writer);\n }\n }\n stream._backpressure = backpressure;\n }\n /**\n * A default writer vended by a {@link WritableStream}.\n *\n * @public\n */\n class WritableStreamDefaultWriter {\n constructor(stream) {\n assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n assertWritableStream(stream, 'First parameter');\n if (IsWritableStreamLocked(stream)) {\n throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n }\n this._ownerWritableStream = stream;\n stream._writer = this;\n const state = stream._state;\n if (state === 'writable') {\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n defaultWriterReadyPromiseInitialize(this);\n }\n else {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n }\n defaultWriterClosedPromiseInitialize(this);\n }\n else if (state === 'erroring') {\n defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n defaultWriterClosedPromiseInitialize(this);\n }\n else if (state === 'closed') {\n defaultWriterReadyPromiseInitializeAsResolved(this);\n defaultWriterClosedPromiseInitializeAsResolved(this);\n }\n else {\n const storedError = stream._storedError;\n defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n }\n }\n /**\n * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n * the writer’s lock is released before the stream finishes closing.\n */\n get closed() {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n }\n return this._closedPromise;\n }\n /**\n * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n * A producer can use this information to determine the right amount of data to write.\n *\n * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n * the writer’s lock is released.\n */\n get desiredSize() {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('desiredSize');\n }\n if (this._ownerWritableStream === undefined) {\n throw defaultWriterLockException('desiredSize');\n }\n return WritableStreamDefaultWriterGetDesiredSize(this);\n }\n /**\n * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n *\n * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n * rejected.\n */\n get ready() {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n }\n return this._readyPromise;\n }\n /**\n * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n */\n abort(reason = undefined) {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n }\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('abort'));\n }\n return WritableStreamDefaultWriterAbort(this, reason);\n }\n /**\n * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n */\n close() {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n }\n const stream = this._ownerWritableStream;\n if (stream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('close'));\n }\n if (WritableStreamCloseQueuedOrInFlight(stream)) {\n return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n }\n return WritableStreamDefaultWriterClose(this);\n }\n /**\n * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n * now on; otherwise, the writer will appear closed.\n *\n * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n * other producers from writing in an interleaved manner.\n */\n releaseLock() {\n if (!IsWritableStreamDefaultWriter(this)) {\n throw defaultWriterBrandCheckException('releaseLock');\n }\n const stream = this._ownerWritableStream;\n if (stream === undefined) {\n return;\n }\n WritableStreamDefaultWriterRelease(this);\n }\n write(chunk = undefined) {\n if (!IsWritableStreamDefaultWriter(this)) {\n return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n }\n if (this._ownerWritableStream === undefined) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n return WritableStreamDefaultWriterWrite(this, chunk);\n }\n }\n Object.defineProperties(WritableStreamDefaultWriter.prototype, {\n abort: { enumerable: true },\n close: { enumerable: true },\n releaseLock: { enumerable: true },\n write: { enumerable: true },\n closed: { enumerable: true },\n desiredSize: { enumerable: true },\n ready: { enumerable: true }\n });\n setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\n setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\n setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\n setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultWriter',\n configurable: true\n });\n }\n // Abstract operations for the WritableStreamDefaultWriter.\n function IsWritableStreamDefaultWriter(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n return false;\n }\n return x instanceof WritableStreamDefaultWriter;\n }\n // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n function WritableStreamDefaultWriterAbort(writer, reason) {\n const stream = writer._ownerWritableStream;\n return WritableStreamAbort(stream, reason);\n }\n function WritableStreamDefaultWriterClose(writer) {\n const stream = writer._ownerWritableStream;\n return WritableStreamClose(stream);\n }\n function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n return WritableStreamDefaultWriterClose(writer);\n }\n function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {\n if (writer._closedPromiseState === 'pending') {\n defaultWriterClosedPromiseReject(writer, error);\n }\n else {\n defaultWriterClosedPromiseResetToRejected(writer, error);\n }\n }\n function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {\n if (writer._readyPromiseState === 'pending') {\n defaultWriterReadyPromiseReject(writer, error);\n }\n else {\n defaultWriterReadyPromiseResetToRejected(writer, error);\n }\n }\n function WritableStreamDefaultWriterGetDesiredSize(writer) {\n const stream = writer._ownerWritableStream;\n const state = stream._state;\n if (state === 'errored' || state === 'erroring') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n }\n function WritableStreamDefaultWriterRelease(writer) {\n const stream = writer._ownerWritableStream;\n const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`);\n WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n // rejected until afterwards. This means that simply testing state will not work.\n WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n stream._writer = undefined;\n writer._ownerWritableStream = undefined;\n }\n function WritableStreamDefaultWriterWrite(writer, chunk) {\n const stream = writer._ownerWritableStream;\n const controller = stream._writableStreamController;\n const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n if (stream !== writer._ownerWritableStream) {\n return promiseRejectedWith(defaultWriterLockException('write to'));\n }\n const state = stream._state;\n if (state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n }\n if (state === 'erroring') {\n return promiseRejectedWith(stream._storedError);\n }\n const promise = WritableStreamAddWriteRequest(stream);\n WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n return promise;\n }\n const closeSentinel = {};\n /**\n * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n *\n * @public\n */\n class WritableStreamDefaultController {\n constructor() {\n throw new TypeError('Illegal constructor');\n }\n /**\n * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n *\n * @deprecated\n * This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n * Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n */\n get abortReason() {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$2('abortReason');\n }\n return this._abortReason;\n }\n /**\n * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n */\n get signal() {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$2('signal');\n }\n if (this._abortController === undefined) {\n // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n }\n return this._abortController.signal;\n }\n /**\n * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n *\n * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n * normal lifecycle of interactions with the underlying sink.\n */\n error(e = undefined) {\n if (!IsWritableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$2('error');\n }\n const state = this._controlledWritableStream._state;\n if (state !== 'writable') {\n // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n // just treat it as a no-op.\n return;\n }\n WritableStreamDefaultControllerError(this, e);\n }\n /** @internal */\n [AbortSteps](reason) {\n const result = this._abortAlgorithm(reason);\n WritableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n /** @internal */\n [ErrorSteps]() {\n ResetQueue(this);\n }\n }\n Object.defineProperties(WritableStreamDefaultController.prototype, {\n abortReason: { enumerable: true },\n signal: { enumerable: true },\n error: { enumerable: true }\n });\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'WritableStreamDefaultController',\n configurable: true\n });\n }\n // Abstract operations implementing interface required by the WritableStream.\n function IsWritableStreamDefaultController(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n return false;\n }\n return x instanceof WritableStreamDefaultController;\n }\n function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) {\n controller._controlledWritableStream = stream;\n stream._writableStreamController = controller;\n // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n controller._queue = undefined;\n controller._queueTotalSize = undefined;\n ResetQueue(controller);\n controller._abortReason = undefined;\n controller._abortController = createAbortController();\n controller._started = false;\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n controller._writeAlgorithm = writeAlgorithm;\n controller._closeAlgorithm = closeAlgorithm;\n controller._abortAlgorithm = abortAlgorithm;\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n const startResult = startAlgorithm();\n const startPromise = promiseResolvedWith(startResult);\n uponPromise(startPromise, () => {\n controller._started = true;\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n }, r => {\n controller._started = true;\n WritableStreamDealWithRejection(stream, r);\n return null;\n });\n }\n function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) {\n const controller = Object.create(WritableStreamDefaultController.prototype);\n let startAlgorithm;\n let writeAlgorithm;\n let closeAlgorithm;\n let abortAlgorithm;\n if (underlyingSink.start !== undefined) {\n startAlgorithm = () => underlyingSink.start(controller);\n }\n else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSink.write !== undefined) {\n writeAlgorithm = chunk => underlyingSink.write(chunk, controller);\n }\n else {\n writeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.close !== undefined) {\n closeAlgorithm = () => underlyingSink.close();\n }\n else {\n closeAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSink.abort !== undefined) {\n abortAlgorithm = reason => underlyingSink.abort(reason);\n }\n else {\n abortAlgorithm = () => promiseResolvedWith(undefined);\n }\n SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);\n }\n // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\n function WritableStreamDefaultControllerClearAlgorithms(controller) {\n controller._writeAlgorithm = undefined;\n controller._closeAlgorithm = undefined;\n controller._abortAlgorithm = undefined;\n controller._strategySizeAlgorithm = undefined;\n }\n function WritableStreamDefaultControllerClose(controller) {\n EnqueueValueWithSize(controller, closeSentinel, 0);\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n }\n function WritableStreamDefaultControllerGetChunkSize(controller, chunk) {\n try {\n return controller._strategySizeAlgorithm(chunk);\n }\n catch (chunkSizeE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n return 1;\n }\n }\n function WritableStreamDefaultControllerGetDesiredSize(controller) {\n return controller._strategyHWM - controller._queueTotalSize;\n }\n function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) {\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n }\n catch (enqueueE) {\n WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n return;\n }\n const stream = controller._controlledWritableStream;\n if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n }\n // Abstract operations for the WritableStreamDefaultController.\n function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {\n const stream = controller._controlledWritableStream;\n if (!controller._started) {\n return;\n }\n if (stream._inFlightWriteRequest !== undefined) {\n return;\n }\n const state = stream._state;\n if (state === 'erroring') {\n WritableStreamFinishErroring(stream);\n return;\n }\n if (controller._queue.length === 0) {\n return;\n }\n const value = PeekQueueValue(controller);\n if (value === closeSentinel) {\n WritableStreamDefaultControllerProcessClose(controller);\n }\n else {\n WritableStreamDefaultControllerProcessWrite(controller, value);\n }\n }\n function WritableStreamDefaultControllerErrorIfNeeded(controller, error) {\n if (controller._controlledWritableStream._state === 'writable') {\n WritableStreamDefaultControllerError(controller, error);\n }\n }\n function WritableStreamDefaultControllerProcessClose(controller) {\n const stream = controller._controlledWritableStream;\n WritableStreamMarkCloseRequestInFlight(stream);\n DequeueValue(controller);\n const sinkClosePromise = controller._closeAlgorithm();\n WritableStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(sinkClosePromise, () => {\n WritableStreamFinishInFlightClose(stream);\n return null;\n }, reason => {\n WritableStreamFinishInFlightCloseWithError(stream, reason);\n return null;\n });\n }\n function WritableStreamDefaultControllerProcessWrite(controller, chunk) {\n const stream = controller._controlledWritableStream;\n WritableStreamMarkFirstWriteRequestInFlight(stream);\n const sinkWritePromise = controller._writeAlgorithm(chunk);\n uponPromise(sinkWritePromise, () => {\n WritableStreamFinishInFlightWrite(stream);\n const state = stream._state;\n DequeueValue(controller);\n if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n WritableStreamUpdateBackpressure(stream, backpressure);\n }\n WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n return null;\n }, reason => {\n if (stream._state === 'writable') {\n WritableStreamDefaultControllerClearAlgorithms(controller);\n }\n WritableStreamFinishInFlightWriteWithError(stream, reason);\n return null;\n });\n }\n function WritableStreamDefaultControllerGetBackpressure(controller) {\n const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n return desiredSize <= 0;\n }\n // A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n function WritableStreamDefaultControllerError(controller, error) {\n const stream = controller._controlledWritableStream;\n WritableStreamDefaultControllerClearAlgorithms(controller);\n WritableStreamStartErroring(stream, error);\n }\n // Helper functions for the WritableStream.\n function streamBrandCheckException$2(name) {\n return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n }\n // Helper functions for the WritableStreamDefaultController.\n function defaultControllerBrandCheckException$2(name) {\n return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n }\n // Helper functions for the WritableStreamDefaultWriter.\n function defaultWriterBrandCheckException(name) {\n return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n }\n function defaultWriterLockException(name) {\n return new TypeError('Cannot ' + name + ' a stream using a released writer');\n }\n function defaultWriterClosedPromiseInitialize(writer) {\n writer._closedPromise = newPromise((resolve, reject) => {\n writer._closedPromise_resolve = resolve;\n writer._closedPromise_reject = reject;\n writer._closedPromiseState = 'pending';\n });\n }\n function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseReject(writer, reason);\n }\n function defaultWriterClosedPromiseInitializeAsResolved(writer) {\n defaultWriterClosedPromiseInitialize(writer);\n defaultWriterClosedPromiseResolve(writer);\n }\n function defaultWriterClosedPromiseReject(writer, reason) {\n if (writer._closedPromise_reject === undefined) {\n return;\n }\n setPromiseIsHandledToTrue(writer._closedPromise);\n writer._closedPromise_reject(reason);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'rejected';\n }\n function defaultWriterClosedPromiseResetToRejected(writer, reason) {\n defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n }\n function defaultWriterClosedPromiseResolve(writer) {\n if (writer._closedPromise_resolve === undefined) {\n return;\n }\n writer._closedPromise_resolve(undefined);\n writer._closedPromise_resolve = undefined;\n writer._closedPromise_reject = undefined;\n writer._closedPromiseState = 'resolved';\n }\n function defaultWriterReadyPromiseInitialize(writer) {\n writer._readyPromise = newPromise((resolve, reject) => {\n writer._readyPromise_resolve = resolve;\n writer._readyPromise_reject = reject;\n });\n writer._readyPromiseState = 'pending';\n }\n function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseReject(writer, reason);\n }\n function defaultWriterReadyPromiseInitializeAsResolved(writer) {\n defaultWriterReadyPromiseInitialize(writer);\n defaultWriterReadyPromiseResolve(writer);\n }\n function defaultWriterReadyPromiseReject(writer, reason) {\n if (writer._readyPromise_reject === undefined) {\n return;\n }\n setPromiseIsHandledToTrue(writer._readyPromise);\n writer._readyPromise_reject(reason);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'rejected';\n }\n function defaultWriterReadyPromiseReset(writer) {\n defaultWriterReadyPromiseInitialize(writer);\n }\n function defaultWriterReadyPromiseResetToRejected(writer, reason) {\n defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n }\n function defaultWriterReadyPromiseResolve(writer) {\n if (writer._readyPromise_resolve === undefined) {\n return;\n }\n writer._readyPromise_resolve(undefined);\n writer._readyPromise_resolve = undefined;\n writer._readyPromise_reject = undefined;\n writer._readyPromiseState = 'fulfilled';\n }\n\n /// \n function getGlobals() {\n if (typeof globalThis !== 'undefined') {\n return globalThis;\n }\n else if (typeof self !== 'undefined') {\n return self;\n }\n else if (typeof global !== 'undefined') {\n return global;\n }\n return undefined;\n }\n const globals = getGlobals();\n\n /// \n function isDOMExceptionConstructor(ctor) {\n if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n return false;\n }\n if (ctor.name !== 'DOMException') {\n return false;\n }\n try {\n new ctor();\n return true;\n }\n catch (_a) {\n return false;\n }\n }\n /**\n * Support:\n * - Web browsers\n * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n */\n function getFromGlobal() {\n const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException;\n return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n }\n /**\n * Support:\n * - All platforms\n */\n function createPolyfill() {\n // eslint-disable-next-line @typescript-eslint/no-shadow\n const ctor = function DOMException(message, name) {\n this.message = message || '';\n this.name = name || 'Error';\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, this.constructor);\n }\n };\n setFunctionName(ctor, 'DOMException');\n ctor.prototype = Object.create(Error.prototype);\n Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n return ctor;\n }\n // eslint-disable-next-line @typescript-eslint/no-redeclare\n const DOMException = getFromGlobal() || createPolyfill();\n\n function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) {\n const reader = AcquireReadableStreamDefaultReader(source);\n const writer = AcquireWritableStreamDefaultWriter(dest);\n source._disturbed = true;\n let shuttingDown = false;\n // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n let currentWrite = promiseResolvedWith(undefined);\n return newPromise((resolve, reject) => {\n let abortAlgorithm;\n if (signal !== undefined) {\n abortAlgorithm = () => {\n const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n const actions = [];\n if (!preventAbort) {\n actions.push(() => {\n if (dest._state === 'writable') {\n return WritableStreamAbort(dest, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n if (!preventCancel) {\n actions.push(() => {\n if (source._state === 'readable') {\n return ReadableStreamCancel(source, error);\n }\n return promiseResolvedWith(undefined);\n });\n }\n shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n };\n if (signal.aborted) {\n abortAlgorithm();\n return;\n }\n signal.addEventListener('abort', abortAlgorithm);\n }\n // Using reader and writer, read all chunks from this and write them to dest\n // - Backpressure must be enforced\n // - Shutdown must stop all activity\n function pipeLoop() {\n return newPromise((resolveLoop, rejectLoop) => {\n function next(done) {\n if (done) {\n resolveLoop();\n }\n else {\n // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n PerformPromiseThen(pipeStep(), next, rejectLoop);\n }\n }\n next(false);\n });\n }\n function pipeStep() {\n if (shuttingDown) {\n return promiseResolvedWith(true);\n }\n return PerformPromiseThen(writer._readyPromise, () => {\n return newPromise((resolveRead, rejectRead) => {\n ReadableStreamDefaultReaderRead(reader, {\n _chunkSteps: chunk => {\n currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n resolveRead(false);\n },\n _closeSteps: () => resolveRead(true),\n _errorSteps: rejectRead\n });\n });\n });\n }\n // Errors must be propagated forward\n isOrBecomesErrored(source, reader._closedPromise, storedError => {\n if (!preventAbort) {\n shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n }\n else {\n shutdown(true, storedError);\n }\n return null;\n });\n // Errors must be propagated backward\n isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n }\n else {\n shutdown(true, storedError);\n }\n return null;\n });\n // Closing must be propagated forward\n isOrBecomesClosed(source, reader._closedPromise, () => {\n if (!preventClose) {\n shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n }\n else {\n shutdown();\n }\n return null;\n });\n // Closing must be propagated backward\n if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n if (!preventCancel) {\n shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n }\n else {\n shutdown(true, destClosed);\n }\n }\n setPromiseIsHandledToTrue(pipeLoop());\n function waitForWritesToFinish() {\n // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n // for that too.\n const oldCurrentWrite = currentWrite;\n return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined);\n }\n function isOrBecomesErrored(stream, promise, action) {\n if (stream._state === 'errored') {\n action(stream._storedError);\n }\n else {\n uponRejection(promise, action);\n }\n }\n function isOrBecomesClosed(stream, promise, action) {\n if (stream._state === 'closed') {\n action();\n }\n else {\n uponFulfillment(promise, action);\n }\n }\n function shutdownWithAction(action, originalIsError, originalError) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), doTheRest);\n }\n else {\n doTheRest();\n }\n function doTheRest() {\n uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError));\n return null;\n }\n }\n function shutdown(isError, error) {\n if (shuttingDown) {\n return;\n }\n shuttingDown = true;\n if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n }\n else {\n finalize(isError, error);\n }\n }\n function finalize(isError, error) {\n WritableStreamDefaultWriterRelease(writer);\n ReadableStreamReaderGenericRelease(reader);\n if (signal !== undefined) {\n signal.removeEventListener('abort', abortAlgorithm);\n }\n if (isError) {\n reject(error);\n }\n else {\n resolve(undefined);\n }\n return null;\n }\n });\n }\n\n /**\n * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n *\n * @public\n */\n class ReadableStreamDefaultController {\n constructor() {\n throw new TypeError('Illegal constructor');\n }\n /**\n * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n */\n get desiredSize() {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$1('desiredSize');\n }\n return ReadableStreamDefaultControllerGetDesiredSize(this);\n }\n /**\n * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n * the stream, but once those are read, the stream will become closed.\n */\n close() {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$1('close');\n }\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits close');\n }\n ReadableStreamDefaultControllerClose(this);\n }\n enqueue(chunk = undefined) {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$1('enqueue');\n }\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n throw new TypeError('The stream is not in a state that permits enqueue');\n }\n return ReadableStreamDefaultControllerEnqueue(this, chunk);\n }\n /**\n * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n */\n error(e = undefined) {\n if (!IsReadableStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException$1('error');\n }\n ReadableStreamDefaultControllerError(this, e);\n }\n /** @internal */\n [CancelSteps](reason) {\n ResetQueue(this);\n const result = this._cancelAlgorithm(reason);\n ReadableStreamDefaultControllerClearAlgorithms(this);\n return result;\n }\n /** @internal */\n [PullSteps](readRequest) {\n const stream = this._controlledReadableStream;\n if (this._queue.length > 0) {\n const chunk = DequeueValue(this);\n if (this._closeRequested && this._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(this);\n ReadableStreamClose(stream);\n }\n else {\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n readRequest._chunkSteps(chunk);\n }\n else {\n ReadableStreamAddReadRequest(stream, readRequest);\n ReadableStreamDefaultControllerCallPullIfNeeded(this);\n }\n }\n /** @internal */\n [ReleaseSteps]() {\n // Do nothing.\n }\n }\n Object.defineProperties(ReadableStreamDefaultController.prototype, {\n close: { enumerable: true },\n enqueue: { enumerable: true },\n error: { enumerable: true },\n desiredSize: { enumerable: true }\n });\n setFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\n setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\n setFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'ReadableStreamDefaultController',\n configurable: true\n });\n }\n // Abstract operations for the ReadableStreamDefaultController.\n function IsReadableStreamDefaultController(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n return false;\n }\n return x instanceof ReadableStreamDefaultController;\n }\n function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {\n const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n if (!shouldPull) {\n return;\n }\n if (controller._pulling) {\n controller._pullAgain = true;\n return;\n }\n controller._pulling = true;\n const pullPromise = controller._pullAlgorithm();\n uponPromise(pullPromise, () => {\n controller._pulling = false;\n if (controller._pullAgain) {\n controller._pullAgain = false;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n return null;\n }, e => {\n ReadableStreamDefaultControllerError(controller, e);\n return null;\n });\n }\n function ReadableStreamDefaultControllerShouldCallPull(controller) {\n const stream = controller._controlledReadableStream;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return false;\n }\n if (!controller._started) {\n return false;\n }\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n return true;\n }\n const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n if (desiredSize > 0) {\n return true;\n }\n return false;\n }\n function ReadableStreamDefaultControllerClearAlgorithms(controller) {\n controller._pullAlgorithm = undefined;\n controller._cancelAlgorithm = undefined;\n controller._strategySizeAlgorithm = undefined;\n }\n // A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n function ReadableStreamDefaultControllerClose(controller) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n const stream = controller._controlledReadableStream;\n controller._closeRequested = true;\n if (controller._queue.length === 0) {\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamClose(stream);\n }\n }\n function ReadableStreamDefaultControllerEnqueue(controller, chunk) {\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n return;\n }\n const stream = controller._controlledReadableStream;\n if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n ReadableStreamFulfillReadRequest(stream, chunk, false);\n }\n else {\n let chunkSize;\n try {\n chunkSize = controller._strategySizeAlgorithm(chunk);\n }\n catch (chunkSizeE) {\n ReadableStreamDefaultControllerError(controller, chunkSizeE);\n throw chunkSizeE;\n }\n try {\n EnqueueValueWithSize(controller, chunk, chunkSize);\n }\n catch (enqueueE) {\n ReadableStreamDefaultControllerError(controller, enqueueE);\n throw enqueueE;\n }\n }\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n }\n function ReadableStreamDefaultControllerError(controller, e) {\n const stream = controller._controlledReadableStream;\n if (stream._state !== 'readable') {\n return;\n }\n ResetQueue(controller);\n ReadableStreamDefaultControllerClearAlgorithms(controller);\n ReadableStreamError(stream, e);\n }\n function ReadableStreamDefaultControllerGetDesiredSize(controller) {\n const state = controller._controlledReadableStream._state;\n if (state === 'errored') {\n return null;\n }\n if (state === 'closed') {\n return 0;\n }\n return controller._strategyHWM - controller._queueTotalSize;\n }\n // This is used in the implementation of TransformStream.\n function ReadableStreamDefaultControllerHasBackpressure(controller) {\n if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n return false;\n }\n return true;\n }\n function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) {\n const state = controller._controlledReadableStream._state;\n if (!controller._closeRequested && state === 'readable') {\n return true;\n }\n return false;\n }\n function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) {\n controller._controlledReadableStream = stream;\n controller._queue = undefined;\n controller._queueTotalSize = undefined;\n ResetQueue(controller);\n controller._started = false;\n controller._closeRequested = false;\n controller._pullAgain = false;\n controller._pulling = false;\n controller._strategySizeAlgorithm = sizeAlgorithm;\n controller._strategyHWM = highWaterMark;\n controller._pullAlgorithm = pullAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n stream._readableStreamController = controller;\n const startResult = startAlgorithm();\n uponPromise(promiseResolvedWith(startResult), () => {\n controller._started = true;\n ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(controller, r);\n return null;\n });\n }\n function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) {\n const controller = Object.create(ReadableStreamDefaultController.prototype);\n let startAlgorithm;\n let pullAlgorithm;\n let cancelAlgorithm;\n if (underlyingSource.start !== undefined) {\n startAlgorithm = () => underlyingSource.start(controller);\n }\n else {\n startAlgorithm = () => undefined;\n }\n if (underlyingSource.pull !== undefined) {\n pullAlgorithm = () => underlyingSource.pull(controller);\n }\n else {\n pullAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (underlyingSource.cancel !== undefined) {\n cancelAlgorithm = reason => underlyingSource.cancel(reason);\n }\n else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);\n }\n // Helper functions for the ReadableStreamDefaultController.\n function defaultControllerBrandCheckException$1(name) {\n return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n }\n\n function ReadableStreamTee(stream, cloneForBranch2) {\n if (IsReadableByteStreamController(stream._readableStreamController)) {\n return ReadableByteStreamTee(stream);\n }\n return ReadableStreamDefaultTee(stream);\n }\n function ReadableStreamDefaultTee(stream, cloneForBranch2) {\n const reader = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgain = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1;\n let reason2;\n let branch1;\n let branch2;\n let resolveCancelPromise;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n function pullAlgorithm() {\n if (reading) {\n readAgain = true;\n return promiseResolvedWith(undefined);\n }\n reading = true;\n const readRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n _queueMicrotask(() => {\n readAgain = false;\n const chunk1 = chunk;\n const chunk2 = chunk;\n // There is no way to access the cloning code right now in the reference implementation.\n // If we add one then we'll need an implementation for serializable objects.\n // if (!canceled2 && cloneForBranch2) {\n // chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n // }\n if (!canceled1) {\n ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n reading = false;\n if (readAgain) {\n pullAlgorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n return promiseResolvedWith(undefined);\n }\n function cancel1Algorithm(reason) {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n function cancel2Algorithm(reason) {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n function startAlgorithm() {\n // do nothing\n }\n branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n uponRejection(reader._closedPromise, (r) => {\n ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n return [branch1, branch2];\n }\n function ReadableByteStreamTee(stream) {\n let reader = AcquireReadableStreamDefaultReader(stream);\n let reading = false;\n let readAgainForBranch1 = false;\n let readAgainForBranch2 = false;\n let canceled1 = false;\n let canceled2 = false;\n let reason1;\n let reason2;\n let branch1;\n let branch2;\n let resolveCancelPromise;\n const cancelPromise = newPromise(resolve => {\n resolveCancelPromise = resolve;\n });\n function forwardReaderError(thisReader) {\n uponRejection(thisReader._closedPromise, r => {\n if (thisReader !== reader) {\n return null;\n }\n ReadableByteStreamControllerError(branch1._readableStreamController, r);\n ReadableByteStreamControllerError(branch2._readableStreamController, r);\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n return null;\n });\n }\n function pullWithDefaultReader() {\n if (IsReadableStreamBYOBReader(reader)) {\n ReadableStreamReaderGenericRelease(reader);\n reader = AcquireReadableStreamDefaultReader(stream);\n forwardReaderError(reader);\n }\n const readRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n _queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n const chunk1 = chunk;\n let chunk2 = chunk;\n if (!canceled1 && !canceled2) {\n try {\n chunk2 = CloneAsUint8Array(chunk);\n }\n catch (cloneE) {\n ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n }\n if (!canceled1) {\n ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n }\n if (!canceled2) {\n ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n }\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n }\n else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: () => {\n reading = false;\n if (!canceled1) {\n ReadableByteStreamControllerClose(branch1._readableStreamController);\n }\n if (!canceled2) {\n ReadableByteStreamControllerClose(branch2._readableStreamController);\n }\n if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n }\n if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n }\n if (!canceled1 || !canceled2) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamDefaultReaderRead(reader, readRequest);\n }\n function pullWithBYOBReader(view, forBranch2) {\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamReaderGenericRelease(reader);\n reader = AcquireReadableStreamBYOBReader(stream);\n forwardReaderError(reader);\n }\n const byobBranch = forBranch2 ? branch2 : branch1;\n const otherBranch = forBranch2 ? branch1 : branch2;\n const readIntoRequest = {\n _chunkSteps: chunk => {\n // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n // successful synchronously-available reads get ahead of asynchronously-available errors.\n _queueMicrotask(() => {\n readAgainForBranch1 = false;\n readAgainForBranch2 = false;\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n if (!otherCanceled) {\n let clonedChunk;\n try {\n clonedChunk = CloneAsUint8Array(chunk);\n }\n catch (cloneE) {\n ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n return;\n }\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n }\n else if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n reading = false;\n if (readAgainForBranch1) {\n pull1Algorithm();\n }\n else if (readAgainForBranch2) {\n pull2Algorithm();\n }\n });\n },\n _closeSteps: chunk => {\n reading = false;\n const byobCanceled = forBranch2 ? canceled2 : canceled1;\n const otherCanceled = forBranch2 ? canceled1 : canceled2;\n if (!byobCanceled) {\n ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n }\n if (!otherCanceled) {\n ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n }\n if (chunk !== undefined) {\n if (!byobCanceled) {\n ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n }\n if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n }\n }\n if (!byobCanceled || !otherCanceled) {\n resolveCancelPromise(undefined);\n }\n },\n _errorSteps: () => {\n reading = false;\n }\n };\n ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n }\n function pull1Algorithm() {\n if (reading) {\n readAgainForBranch1 = true;\n return promiseResolvedWith(undefined);\n }\n reading = true;\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n }\n else {\n pullWithBYOBReader(byobRequest._view, false);\n }\n return promiseResolvedWith(undefined);\n }\n function pull2Algorithm() {\n if (reading) {\n readAgainForBranch2 = true;\n return promiseResolvedWith(undefined);\n }\n reading = true;\n const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n if (byobRequest === null) {\n pullWithDefaultReader();\n }\n else {\n pullWithBYOBReader(byobRequest._view, true);\n }\n return promiseResolvedWith(undefined);\n }\n function cancel1Algorithm(reason) {\n canceled1 = true;\n reason1 = reason;\n if (canceled2) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n function cancel2Algorithm(reason) {\n canceled2 = true;\n reason2 = reason;\n if (canceled1) {\n const compositeReason = CreateArrayFromList([reason1, reason2]);\n const cancelResult = ReadableStreamCancel(stream, compositeReason);\n resolveCancelPromise(cancelResult);\n }\n return cancelPromise;\n }\n function startAlgorithm() {\n return;\n }\n branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n forwardReaderError(reader);\n return [branch1, branch2];\n }\n\n function isReadableStreamLike(stream) {\n return typeIsObject(stream) && typeof stream.getReader !== 'undefined';\n }\n\n function ReadableStreamFrom(source) {\n if (isReadableStreamLike(source)) {\n return ReadableStreamFromDefaultReader(source.getReader());\n }\n return ReadableStreamFromIterable(source);\n }\n function ReadableStreamFromIterable(asyncIterable) {\n let stream;\n const iteratorRecord = GetIterator(asyncIterable, 'async');\n const startAlgorithm = noop;\n function pullAlgorithm() {\n let nextResult;\n try {\n nextResult = IteratorNext(iteratorRecord);\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n const nextPromise = promiseResolvedWith(nextResult);\n return transformPromiseWith(nextPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n }\n const done = IteratorComplete(iterResult);\n if (done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n }\n else {\n const value = IteratorValue(iterResult);\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n function cancelAlgorithm(reason) {\n const iterator = iteratorRecord.iterator;\n let returnMethod;\n try {\n returnMethod = GetMethod(iterator, 'return');\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n if (returnMethod === undefined) {\n return promiseResolvedWith(undefined);\n }\n let returnResult;\n try {\n returnResult = reflectCall(returnMethod, iterator, [reason]);\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n const returnPromise = promiseResolvedWith(returnResult);\n return transformPromiseWith(returnPromise, iterResult => {\n if (!typeIsObject(iterResult)) {\n throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n }\n return undefined;\n });\n }\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n }\n function ReadableStreamFromDefaultReader(reader) {\n let stream;\n const startAlgorithm = noop;\n function pullAlgorithm() {\n let readPromise;\n try {\n readPromise = reader.read();\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n return transformPromiseWith(readPromise, readResult => {\n if (!typeIsObject(readResult)) {\n throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n }\n if (readResult.done) {\n ReadableStreamDefaultControllerClose(stream._readableStreamController);\n }\n else {\n const value = readResult.value;\n ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n }\n });\n }\n function cancelAlgorithm(reason) {\n try {\n return promiseResolvedWith(reader.cancel(reason));\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n }\n stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n return stream;\n }\n\n function convertUnderlyingDefaultOrByteSource(source, context) {\n assertDictionary(source, context);\n const original = source;\n const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize;\n const cancel = original === null || original === void 0 ? void 0 : original.cancel;\n const pull = original === null || original === void 0 ? void 0 : original.pull;\n const start = original === null || original === void 0 ? void 0 : original.start;\n const type = original === null || original === void 0 ? void 0 : original.type;\n return {\n autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n undefined :\n convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`),\n cancel: cancel === undefined ?\n undefined :\n convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`),\n pull: pull === undefined ?\n undefined :\n convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`),\n start: start === undefined ?\n undefined :\n convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`),\n type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n };\n }\n function convertUnderlyingSourceCancelCallback(fn, original, context) {\n assertFunction(fn, context);\n return (reason) => promiseCall(fn, original, [reason]);\n }\n function convertUnderlyingSourcePullCallback(fn, original, context) {\n assertFunction(fn, context);\n return (controller) => promiseCall(fn, original, [controller]);\n }\n function convertUnderlyingSourceStartCallback(fn, original, context) {\n assertFunction(fn, context);\n return (controller) => reflectCall(fn, original, [controller]);\n }\n function convertReadableStreamType(type, context) {\n type = `${type}`;\n if (type !== 'bytes') {\n throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n }\n return type;\n }\n\n function convertIteratorOptions(options, context) {\n assertDictionary(options, context);\n const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;\n return { preventCancel: Boolean(preventCancel) };\n }\n\n function convertPipeOptions(options, context) {\n assertDictionary(options, context);\n const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort;\n const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;\n const preventClose = options === null || options === void 0 ? void 0 : options.preventClose;\n const signal = options === null || options === void 0 ? void 0 : options.signal;\n if (signal !== undefined) {\n assertAbortSignal(signal, `${context} has member 'signal' that`);\n }\n return {\n preventAbort: Boolean(preventAbort),\n preventCancel: Boolean(preventCancel),\n preventClose: Boolean(preventClose),\n signal\n };\n }\n function assertAbortSignal(signal, context) {\n if (!isAbortSignal(signal)) {\n throw new TypeError(`${context} is not an AbortSignal.`);\n }\n }\n\n function convertReadableWritablePair(pair, context) {\n assertDictionary(pair, context);\n const readable = pair === null || pair === void 0 ? void 0 : pair.readable;\n assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n assertReadableStream(readable, `${context} has member 'readable' that`);\n const writable = pair === null || pair === void 0 ? void 0 : pair.writable;\n assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n assertWritableStream(writable, `${context} has member 'writable' that`);\n return { readable, writable };\n }\n\n /**\n * A readable stream represents a source of data, from which you can read.\n *\n * @public\n */\n class ReadableStream {\n constructor(rawUnderlyingSource = {}, rawStrategy = {}) {\n if (rawUnderlyingSource === undefined) {\n rawUnderlyingSource = null;\n }\n else {\n assertObject(rawUnderlyingSource, 'First parameter');\n }\n const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n InitializeReadableStream(this);\n if (underlyingSource.type === 'bytes') {\n if (strategy.size !== undefined) {\n throw new RangeError('The strategy for a byte stream cannot have a size function');\n }\n const highWaterMark = ExtractHighWaterMark(strategy, 0);\n SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark);\n }\n else {\n const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n const highWaterMark = ExtractHighWaterMark(strategy, 1);\n SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm);\n }\n }\n /**\n * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n */\n get locked() {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException$1('locked');\n }\n return IsReadableStreamLocked(this);\n }\n /**\n * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n *\n * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n * method, which might or might not use it.\n */\n cancel(reason = undefined) {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException$1('cancel'));\n }\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n }\n return ReadableStreamCancel(this, reason);\n }\n getReader(rawOptions = undefined) {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException$1('getReader');\n }\n const options = convertReaderOptions(rawOptions, 'First parameter');\n if (options.mode === undefined) {\n return AcquireReadableStreamDefaultReader(this);\n }\n return AcquireReadableStreamBYOBReader(this);\n }\n pipeThrough(rawTransform, rawOptions = {}) {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException$1('pipeThrough');\n }\n assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n const options = convertPipeOptions(rawOptions, 'Second parameter');\n if (IsReadableStreamLocked(this)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n }\n if (IsWritableStreamLocked(transform.writable)) {\n throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n }\n const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal);\n setPromiseIsHandledToTrue(promise);\n return transform.readable;\n }\n pipeTo(destination, rawOptions = {}) {\n if (!IsReadableStream(this)) {\n return promiseRejectedWith(streamBrandCheckException$1('pipeTo'));\n }\n if (destination === undefined) {\n return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n }\n if (!IsWritableStream(destination)) {\n return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`));\n }\n let options;\n try {\n options = convertPipeOptions(rawOptions, 'Second parameter');\n }\n catch (e) {\n return promiseRejectedWith(e);\n }\n if (IsReadableStreamLocked(this)) {\n return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream'));\n }\n if (IsWritableStreamLocked(destination)) {\n return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream'));\n }\n return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal);\n }\n /**\n * Tees this readable stream, returning a two-element array containing the two resulting branches as\n * new {@link ReadableStream} instances.\n *\n * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n * propagated to the stream's underlying source.\n *\n * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n * this could allow interference between the two branches.\n */\n tee() {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException$1('tee');\n }\n const branches = ReadableStreamTee(this);\n return CreateArrayFromList(branches);\n }\n values(rawOptions = undefined) {\n if (!IsReadableStream(this)) {\n throw streamBrandCheckException$1('values');\n }\n const options = convertIteratorOptions(rawOptions, 'First parameter');\n return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n }\n [SymbolAsyncIterator](options) {\n // Stub implementation, overridden below\n return this.values(options);\n }\n /**\n * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n *\n * This can be used to adapt various kinds of objects into a readable stream,\n * such as an array, an async generator, or a Node.js readable stream.\n */\n static from(asyncIterable) {\n return ReadableStreamFrom(asyncIterable);\n }\n }\n Object.defineProperties(ReadableStream, {\n from: { enumerable: true }\n });\n Object.defineProperties(ReadableStream.prototype, {\n cancel: { enumerable: true },\n getReader: { enumerable: true },\n pipeThrough: { enumerable: true },\n pipeTo: { enumerable: true },\n tee: { enumerable: true },\n values: { enumerable: true },\n locked: { enumerable: true }\n });\n setFunctionName(ReadableStream.from, 'from');\n setFunctionName(ReadableStream.prototype.cancel, 'cancel');\n setFunctionName(ReadableStream.prototype.getReader, 'getReader');\n setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\n setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\n setFunctionName(ReadableStream.prototype.tee, 'tee');\n setFunctionName(ReadableStream.prototype.values, 'values');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n value: 'ReadableStream',\n configurable: true\n });\n }\n Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n value: ReadableStream.prototype.values,\n writable: true,\n configurable: true\n });\n // Abstract operations for the ReadableStream.\n // Throws if and only if startAlgorithm throws.\n function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {\n const stream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n const controller = Object.create(ReadableStreamDefaultController.prototype);\n SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);\n return stream;\n }\n // Throws if and only if startAlgorithm throws.\n function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) {\n const stream = Object.create(ReadableStream.prototype);\n InitializeReadableStream(stream);\n const controller = Object.create(ReadableByteStreamController.prototype);\n SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n return stream;\n }\n function InitializeReadableStream(stream) {\n stream._state = 'readable';\n stream._reader = undefined;\n stream._storedError = undefined;\n stream._disturbed = false;\n }\n function IsReadableStream(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n return false;\n }\n return x instanceof ReadableStream;\n }\n function IsReadableStreamLocked(stream) {\n if (stream._reader === undefined) {\n return false;\n }\n return true;\n }\n // ReadableStream API exposed for controllers.\n function ReadableStreamCancel(stream, reason) {\n stream._disturbed = true;\n if (stream._state === 'closed') {\n return promiseResolvedWith(undefined);\n }\n if (stream._state === 'errored') {\n return promiseRejectedWith(stream._storedError);\n }\n ReadableStreamClose(stream);\n const reader = stream._reader;\n if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n const readIntoRequests = reader._readIntoRequests;\n reader._readIntoRequests = new SimpleQueue();\n readIntoRequests.forEach(readIntoRequest => {\n readIntoRequest._closeSteps(undefined);\n });\n }\n const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n return transformPromiseWith(sourceCancelPromise, noop);\n }\n function ReadableStreamClose(stream) {\n stream._state = 'closed';\n const reader = stream._reader;\n if (reader === undefined) {\n return;\n }\n defaultReaderClosedPromiseResolve(reader);\n if (IsReadableStreamDefaultReader(reader)) {\n const readRequests = reader._readRequests;\n reader._readRequests = new SimpleQueue();\n readRequests.forEach(readRequest => {\n readRequest._closeSteps();\n });\n }\n }\n function ReadableStreamError(stream, e) {\n stream._state = 'errored';\n stream._storedError = e;\n const reader = stream._reader;\n if (reader === undefined) {\n return;\n }\n defaultReaderClosedPromiseReject(reader, e);\n if (IsReadableStreamDefaultReader(reader)) {\n ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n }\n else {\n ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n }\n }\n // Helper functions for the ReadableStream.\n function streamBrandCheckException$1(name) {\n return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n }\n\n function convertQueuingStrategyInit(init, context) {\n assertDictionary(init, context);\n const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;\n assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n return {\n highWaterMark: convertUnrestrictedDouble(highWaterMark)\n };\n }\n\n // The size function must not have a prototype property nor be a constructor\n const byteLengthSizeFunction = (chunk) => {\n return chunk.byteLength;\n };\n setFunctionName(byteLengthSizeFunction, 'size');\n /**\n * A queuing strategy that counts the number of bytes in each chunk.\n *\n * @public\n */\n class ByteLengthQueuingStrategy {\n constructor(options) {\n assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark() {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('highWaterMark');\n }\n return this._byteLengthQueuingStrategyHighWaterMark;\n }\n /**\n * Measures the size of `chunk` by returning the value of its `byteLength` property.\n */\n get size() {\n if (!IsByteLengthQueuingStrategy(this)) {\n throw byteLengthBrandCheckException('size');\n }\n return byteLengthSizeFunction;\n }\n }\n Object.defineProperties(ByteLengthQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n });\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'ByteLengthQueuingStrategy',\n configurable: true\n });\n }\n // Helper functions for the ByteLengthQueuingStrategy.\n function byteLengthBrandCheckException(name) {\n return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n }\n function IsByteLengthQueuingStrategy(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n return false;\n }\n return x instanceof ByteLengthQueuingStrategy;\n }\n\n // The size function must not have a prototype property nor be a constructor\n const countSizeFunction = () => {\n return 1;\n };\n setFunctionName(countSizeFunction, 'size');\n /**\n * A queuing strategy that counts the number of chunks.\n *\n * @public\n */\n class CountQueuingStrategy {\n constructor(options) {\n assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n options = convertQueuingStrategyInit(options, 'First parameter');\n this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n }\n /**\n * Returns the high water mark provided to the constructor.\n */\n get highWaterMark() {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('highWaterMark');\n }\n return this._countQueuingStrategyHighWaterMark;\n }\n /**\n * Measures the size of `chunk` by always returning 1.\n * This ensures that the total queue size is a count of the number of chunks in the queue.\n */\n get size() {\n if (!IsCountQueuingStrategy(this)) {\n throw countBrandCheckException('size');\n }\n return countSizeFunction;\n }\n }\n Object.defineProperties(CountQueuingStrategy.prototype, {\n highWaterMark: { enumerable: true },\n size: { enumerable: true }\n });\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n value: 'CountQueuingStrategy',\n configurable: true\n });\n }\n // Helper functions for the CountQueuingStrategy.\n function countBrandCheckException(name) {\n return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n }\n function IsCountQueuingStrategy(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n return false;\n }\n return x instanceof CountQueuingStrategy;\n }\n\n function convertTransformer(original, context) {\n assertDictionary(original, context);\n const cancel = original === null || original === void 0 ? void 0 : original.cancel;\n const flush = original === null || original === void 0 ? void 0 : original.flush;\n const readableType = original === null || original === void 0 ? void 0 : original.readableType;\n const start = original === null || original === void 0 ? void 0 : original.start;\n const transform = original === null || original === void 0 ? void 0 : original.transform;\n const writableType = original === null || original === void 0 ? void 0 : original.writableType;\n return {\n cancel: cancel === undefined ?\n undefined :\n convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`),\n flush: flush === undefined ?\n undefined :\n convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`),\n readableType,\n start: start === undefined ?\n undefined :\n convertTransformerStartCallback(start, original, `${context} has member 'start' that`),\n transform: transform === undefined ?\n undefined :\n convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`),\n writableType\n };\n }\n function convertTransformerFlushCallback(fn, original, context) {\n assertFunction(fn, context);\n return (controller) => promiseCall(fn, original, [controller]);\n }\n function convertTransformerStartCallback(fn, original, context) {\n assertFunction(fn, context);\n return (controller) => reflectCall(fn, original, [controller]);\n }\n function convertTransformerTransformCallback(fn, original, context) {\n assertFunction(fn, context);\n return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);\n }\n function convertTransformerCancelCallback(fn, original, context) {\n assertFunction(fn, context);\n return (reason) => promiseCall(fn, original, [reason]);\n }\n\n // Class TransformStream\n /**\n * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n * made available for reading from the readable side.\n *\n * @public\n */\n class TransformStream {\n constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) {\n if (rawTransformer === undefined) {\n rawTransformer = null;\n }\n const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n const transformer = convertTransformer(rawTransformer, 'First parameter');\n if (transformer.readableType !== undefined) {\n throw new RangeError('Invalid readableType specified');\n }\n if (transformer.writableType !== undefined) {\n throw new RangeError('Invalid writableType specified');\n }\n const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n let startPromise_resolve;\n const startPromise = newPromise(resolve => {\n startPromise_resolve = resolve;\n });\n InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm);\n SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n if (transformer.start !== undefined) {\n startPromise_resolve(transformer.start(this._transformStreamController));\n }\n else {\n startPromise_resolve(undefined);\n }\n }\n /**\n * The readable side of the transform stream.\n */\n get readable() {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('readable');\n }\n return this._readable;\n }\n /**\n * The writable side of the transform stream.\n */\n get writable() {\n if (!IsTransformStream(this)) {\n throw streamBrandCheckException('writable');\n }\n return this._writable;\n }\n }\n Object.defineProperties(TransformStream.prototype, {\n readable: { enumerable: true },\n writable: { enumerable: true }\n });\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n value: 'TransformStream',\n configurable: true\n });\n }\n function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) {\n function startAlgorithm() {\n return startPromise;\n }\n function writeAlgorithm(chunk) {\n return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n }\n function abortAlgorithm(reason) {\n return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n }\n function closeAlgorithm() {\n return TransformStreamDefaultSinkCloseAlgorithm(stream);\n }\n stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm);\n function pullAlgorithm() {\n return TransformStreamDefaultSourcePullAlgorithm(stream);\n }\n function cancelAlgorithm(reason) {\n return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n }\n stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm);\n // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n stream._backpressure = undefined;\n stream._backpressureChangePromise = undefined;\n stream._backpressureChangePromise_resolve = undefined;\n TransformStreamSetBackpressure(stream, true);\n stream._transformStreamController = undefined;\n }\n function IsTransformStream(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n return false;\n }\n return x instanceof TransformStream;\n }\n // This is a no-op if both sides are already errored.\n function TransformStreamError(stream, e) {\n ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n }\n function TransformStreamErrorWritableAndUnblockWrite(stream, e) {\n TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n TransformStreamUnblockWrite(stream);\n }\n function TransformStreamUnblockWrite(stream) {\n if (stream._backpressure) {\n // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n // _backpressure is set.\n TransformStreamSetBackpressure(stream, false);\n }\n }\n function TransformStreamSetBackpressure(stream, backpressure) {\n // Passes also when called during construction.\n if (stream._backpressureChangePromise !== undefined) {\n stream._backpressureChangePromise_resolve();\n }\n stream._backpressureChangePromise = newPromise(resolve => {\n stream._backpressureChangePromise_resolve = resolve;\n });\n stream._backpressure = backpressure;\n }\n // Class TransformStreamDefaultController\n /**\n * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n *\n * @public\n */\n class TransformStreamDefaultController {\n constructor() {\n throw new TypeError('Illegal constructor');\n }\n /**\n * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n */\n get desiredSize() {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('desiredSize');\n }\n const readableController = this._controlledTransformStream._readable._readableStreamController;\n return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n }\n enqueue(chunk = undefined) {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('enqueue');\n }\n TransformStreamDefaultControllerEnqueue(this, chunk);\n }\n /**\n * Errors both the readable side and the writable side of the controlled transform stream, making all future\n * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n */\n error(reason = undefined) {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('error');\n }\n TransformStreamDefaultControllerError(this, reason);\n }\n /**\n * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n * transformer only needs to consume a portion of the chunks written to the writable side.\n */\n terminate() {\n if (!IsTransformStreamDefaultController(this)) {\n throw defaultControllerBrandCheckException('terminate');\n }\n TransformStreamDefaultControllerTerminate(this);\n }\n }\n Object.defineProperties(TransformStreamDefaultController.prototype, {\n enqueue: { enumerable: true },\n error: { enumerable: true },\n terminate: { enumerable: true },\n desiredSize: { enumerable: true }\n });\n setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\n setFunctionName(TransformStreamDefaultController.prototype.error, 'error');\n setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\n if (typeof Symbol.toStringTag === 'symbol') {\n Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n value: 'TransformStreamDefaultController',\n configurable: true\n });\n }\n // Transform Stream Default Controller Abstract Operations\n function IsTransformStreamDefaultController(x) {\n if (!typeIsObject(x)) {\n return false;\n }\n if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n return false;\n }\n return x instanceof TransformStreamDefaultController;\n }\n function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) {\n controller._controlledTransformStream = stream;\n stream._transformStreamController = controller;\n controller._transformAlgorithm = transformAlgorithm;\n controller._flushAlgorithm = flushAlgorithm;\n controller._cancelAlgorithm = cancelAlgorithm;\n controller._finishPromise = undefined;\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n }\n function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) {\n const controller = Object.create(TransformStreamDefaultController.prototype);\n let transformAlgorithm;\n let flushAlgorithm;\n let cancelAlgorithm;\n if (transformer.transform !== undefined) {\n transformAlgorithm = chunk => transformer.transform(chunk, controller);\n }\n else {\n transformAlgorithm = chunk => {\n try {\n TransformStreamDefaultControllerEnqueue(controller, chunk);\n return promiseResolvedWith(undefined);\n }\n catch (transformResultE) {\n return promiseRejectedWith(transformResultE);\n }\n };\n }\n if (transformer.flush !== undefined) {\n flushAlgorithm = () => transformer.flush(controller);\n }\n else {\n flushAlgorithm = () => promiseResolvedWith(undefined);\n }\n if (transformer.cancel !== undefined) {\n cancelAlgorithm = reason => transformer.cancel(reason);\n }\n else {\n cancelAlgorithm = () => promiseResolvedWith(undefined);\n }\n SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n }\n function TransformStreamDefaultControllerClearAlgorithms(controller) {\n controller._transformAlgorithm = undefined;\n controller._flushAlgorithm = undefined;\n controller._cancelAlgorithm = undefined;\n }\n function TransformStreamDefaultControllerEnqueue(controller, chunk) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n throw new TypeError('Readable side is not in a state that permits enqueue');\n }\n // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n // accept TransformStreamDefaultControllerEnqueue() calls.\n try {\n ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n }\n catch (e) {\n // This happens when readableStrategy.size() throws.\n TransformStreamErrorWritableAndUnblockWrite(stream, e);\n throw stream._readable._storedError;\n }\n const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n if (backpressure !== stream._backpressure) {\n TransformStreamSetBackpressure(stream, true);\n }\n }\n function TransformStreamDefaultControllerError(controller, e) {\n TransformStreamError(controller._controlledTransformStream, e);\n }\n function TransformStreamDefaultControllerPerformTransform(controller, chunk) {\n const transformPromise = controller._transformAlgorithm(chunk);\n return transformPromiseWith(transformPromise, undefined, r => {\n TransformStreamError(controller._controlledTransformStream, r);\n throw r;\n });\n }\n function TransformStreamDefaultControllerTerminate(controller) {\n const stream = controller._controlledTransformStream;\n const readableController = stream._readable._readableStreamController;\n ReadableStreamDefaultControllerClose(readableController);\n const error = new TypeError('TransformStream terminated');\n TransformStreamErrorWritableAndUnblockWrite(stream, error);\n }\n // TransformStreamDefaultSink Algorithms\n function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) {\n const controller = stream._transformStreamController;\n if (stream._backpressure) {\n const backpressureChangePromise = stream._backpressureChangePromise;\n return transformPromiseWith(backpressureChangePromise, () => {\n const writable = stream._writable;\n const state = writable._state;\n if (state === 'erroring') {\n throw writable._storedError;\n }\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n });\n }\n return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n }\n function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n // we don't run the _cancelAlgorithm again.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(cancelPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n }\n else {\n ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n return controller._finishPromise;\n }\n function TransformStreamDefaultSinkCloseAlgorithm(stream) {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n const readable = stream._readable;\n // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n // we don't also run the _cancelAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n const flushPromise = controller._flushAlgorithm();\n TransformStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(flushPromise, () => {\n if (readable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, readable._storedError);\n }\n else {\n ReadableStreamDefaultControllerClose(readable._readableStreamController);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n return controller._finishPromise;\n }\n // TransformStreamDefaultSource Algorithms\n function TransformStreamDefaultSourcePullAlgorithm(stream) {\n // Invariant. Enforced by the promises returned by start() and pull().\n TransformStreamSetBackpressure(stream, false);\n // Prevent the next pull() call until there is backpressure.\n return stream._backpressureChangePromise;\n }\n function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) {\n const controller = stream._transformStreamController;\n if (controller._finishPromise !== undefined) {\n return controller._finishPromise;\n }\n // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n const writable = stream._writable;\n // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n // _flushAlgorithm.\n controller._finishPromise = newPromise((resolve, reject) => {\n controller._finishPromise_resolve = resolve;\n controller._finishPromise_reject = reject;\n });\n const cancelPromise = controller._cancelAlgorithm(reason);\n TransformStreamDefaultControllerClearAlgorithms(controller);\n uponPromise(cancelPromise, () => {\n if (writable._state === 'errored') {\n defaultControllerFinishPromiseReject(controller, writable._storedError);\n }\n else {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseResolve(controller);\n }\n return null;\n }, r => {\n WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n TransformStreamUnblockWrite(stream);\n defaultControllerFinishPromiseReject(controller, r);\n return null;\n });\n return controller._finishPromise;\n }\n // Helper functions for the TransformStreamDefaultController.\n function defaultControllerBrandCheckException(name) {\n return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n }\n function defaultControllerFinishPromiseResolve(controller) {\n if (controller._finishPromise_resolve === undefined) {\n return;\n }\n controller._finishPromise_resolve();\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n }\n function defaultControllerFinishPromiseReject(controller, reason) {\n if (controller._finishPromise_reject === undefined) {\n return;\n }\n setPromiseIsHandledToTrue(controller._finishPromise);\n controller._finishPromise_reject(reason);\n controller._finishPromise_resolve = undefined;\n controller._finishPromise_reject = undefined;\n }\n // Helper functions for the TransformStream.\n function streamBrandCheckException(name) {\n return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`);\n }\n\n exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy;\n exports.CountQueuingStrategy = CountQueuingStrategy;\n exports.ReadableByteStreamController = ReadableByteStreamController;\n exports.ReadableStream = ReadableStream;\n exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader;\n exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest;\n exports.ReadableStreamDefaultController = ReadableStreamDefaultController;\n exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader;\n exports.TransformStream = TransformStream;\n exports.TransformStreamDefaultController = TransformStreamDefaultController;\n exports.WritableStream = WritableStream;\n exports.WritableStreamDefaultController = WritableStreamDefaultController;\n exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter;\n\n}));\n//# sourceMappingURL=ponyfill.es2018.js.map\n//# sourceURL=[module]\n//# 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* @license\n * web-streams-polyfill v3.3.3\n * Copyright 2024 Mattias Buelens, Diwank Singh Tomer and other contributors.\n * This code is released under the MIT license.\n * SPDX-License-Identifier: MIT\n */\n(function (global, factory) {\n    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n    typeof define === 'function' && define.amd ? define(['exports'], factory) :\n    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.WebStreamsPolyfill = {}));\n})(this, (function (exports) { 'use strict';\n\n    function noop() {\n        return undefined;\n    }\n\n    function typeIsObject(x) {\n        return (typeof x === 'object' && x !== null) || typeof x === 'function';\n    }\n    const rethrowAssertionErrorRejection = noop;\n    function setFunctionName(fn, name) {\n        try {\n            Object.defineProperty(fn, 'name', {\n                value: name,\n                configurable: true\n            });\n        }\n        catch (_a) {\n            // This property is non-configurable in older browsers, so ignore if this throws.\n            // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name#browser_compatibility\n        }\n    }\n\n    const originalPromise = Promise;\n    const originalPromiseThen = Promise.prototype.then;\n    const originalPromiseReject = Promise.reject.bind(originalPromise);\n    // https://webidl.spec.whatwg.org/#a-new-promise\n    function newPromise(executor) {\n        return new originalPromise(executor);\n    }\n    // https://webidl.spec.whatwg.org/#a-promise-resolved-with\n    function promiseResolvedWith(value) {\n        return newPromise(resolve => resolve(value));\n    }\n    // https://webidl.spec.whatwg.org/#a-promise-rejected-with\n    function promiseRejectedWith(reason) {\n        return originalPromiseReject(reason);\n    }\n    function PerformPromiseThen(promise, onFulfilled, onRejected) {\n        // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an\n        // approximation.\n        return originalPromiseThen.call(promise, onFulfilled, onRejected);\n    }\n    // Bluebird logs a warning when a promise is created within a fulfillment handler, but then isn't returned\n    // from that handler. To prevent this, return null instead of void from all handlers.\n    // http://bluebirdjs.com/docs/warning-explanations.html#warning-a-promise-was-created-in-a-handler-but-was-not-returned-from-it\n    function uponPromise(promise, onFulfilled, onRejected) {\n        PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);\n    }\n    function uponFulfillment(promise, onFulfilled) {\n        uponPromise(promise, onFulfilled);\n    }\n    function uponRejection(promise, onRejected) {\n        uponPromise(promise, undefined, onRejected);\n    }\n    function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {\n        return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);\n    }\n    function setPromiseIsHandledToTrue(promise) {\n        PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);\n    }\n    let _queueMicrotask = callback => {\n        if (typeof queueMicrotask === 'function') {\n            _queueMicrotask = queueMicrotask;\n        }\n        else {\n            const resolvedPromise = promiseResolvedWith(undefined);\n            _queueMicrotask = cb => PerformPromiseThen(resolvedPromise, cb);\n        }\n        return _queueMicrotask(callback);\n    };\n    function reflectCall(F, V, args) {\n        if (typeof F !== 'function') {\n            throw new TypeError('Argument is not a function');\n        }\n        return Function.prototype.apply.call(F, V, args);\n    }\n    function promiseCall(F, V, args) {\n        try {\n            return promiseResolvedWith(reflectCall(F, V, args));\n        }\n        catch (value) {\n            return promiseRejectedWith(value);\n        }\n    }\n\n    // Original from Chromium\n    // https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js\n    const QUEUE_MAX_ARRAY_SIZE = 16384;\n    /**\n     * Simple queue structure.\n     *\n     * Avoids scalability issues with using a packed array directly by using\n     * multiple arrays in a linked list and keeping the array size bounded.\n     */\n    class SimpleQueue {\n        constructor() {\n            this._cursor = 0;\n            this._size = 0;\n            // _front and _back are always defined.\n            this._front = {\n                _elements: [],\n                _next: undefined\n            };\n            this._back = this._front;\n            // The cursor is used to avoid calling Array.shift().\n            // It contains the index of the front element of the array inside the\n            // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).\n            this._cursor = 0;\n            // When there is only one node, size === elements.length - cursor.\n            this._size = 0;\n        }\n        get length() {\n            return this._size;\n        }\n        // For exception safety, this method is structured in order:\n        // 1. Read state\n        // 2. Calculate required state mutations\n        // 3. Perform state mutations\n        push(element) {\n            const oldBack = this._back;\n            let newBack = oldBack;\n            if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {\n                newBack = {\n                    _elements: [],\n                    _next: undefined\n                };\n            }\n            // push() is the mutation most likely to throw an exception, so it\n            // goes first.\n            oldBack._elements.push(element);\n            if (newBack !== oldBack) {\n                this._back = newBack;\n                oldBack._next = newBack;\n            }\n            ++this._size;\n        }\n        // Like push(), shift() follows the read -> calculate -> mutate pattern for\n        // exception safety.\n        shift() { // must not be called on an empty queue\n            const oldFront = this._front;\n            let newFront = oldFront;\n            const oldCursor = this._cursor;\n            let newCursor = oldCursor + 1;\n            const elements = oldFront._elements;\n            const element = elements[oldCursor];\n            if (newCursor === QUEUE_MAX_ARRAY_SIZE) {\n                newFront = oldFront._next;\n                newCursor = 0;\n            }\n            // No mutations before this point.\n            --this._size;\n            this._cursor = newCursor;\n            if (oldFront !== newFront) {\n                this._front = newFront;\n            }\n            // Permit shifted element to be garbage collected.\n            elements[oldCursor] = undefined;\n            return element;\n        }\n        // The tricky thing about forEach() is that it can be called\n        // re-entrantly. The queue may be mutated inside the callback. It is easy to\n        // see that push() within the callback has no negative effects since the end\n        // of the queue is checked for on every iteration. If shift() is called\n        // repeatedly within the callback then the next iteration may return an\n        // element that has been removed. In this case the callback will be called\n        // with undefined values until we either \"catch up\" with elements that still\n        // exist or reach the back of the queue.\n        forEach(callback) {\n            let i = this._cursor;\n            let node = this._front;\n            let elements = node._elements;\n            while (i !== elements.length || node._next !== undefined) {\n                if (i === elements.length) {\n                    node = node._next;\n                    elements = node._elements;\n                    i = 0;\n                    if (elements.length === 0) {\n                        break;\n                    }\n                }\n                callback(elements[i]);\n                ++i;\n            }\n        }\n        // Return the element that would be returned if shift() was called now,\n        // without modifying the queue.\n        peek() { // must not be called on an empty queue\n            const front = this._front;\n            const cursor = this._cursor;\n            return front._elements[cursor];\n        }\n    }\n\n    const AbortSteps = Symbol('[[AbortSteps]]');\n    const ErrorSteps = Symbol('[[ErrorSteps]]');\n    const CancelSteps = Symbol('[[CancelSteps]]');\n    const PullSteps = Symbol('[[PullSteps]]');\n    const ReleaseSteps = Symbol('[[ReleaseSteps]]');\n\n    function ReadableStreamReaderGenericInitialize(reader, stream) {\n        reader._ownerReadableStream = stream;\n        stream._reader = reader;\n        if (stream._state === 'readable') {\n            defaultReaderClosedPromiseInitialize(reader);\n        }\n        else if (stream._state === 'closed') {\n            defaultReaderClosedPromiseInitializeAsResolved(reader);\n        }\n        else {\n            defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);\n        }\n    }\n    // A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state\n    // check.\n    function ReadableStreamReaderGenericCancel(reader, reason) {\n        const stream = reader._ownerReadableStream;\n        return ReadableStreamCancel(stream, reason);\n    }\n    function ReadableStreamReaderGenericRelease(reader) {\n        const stream = reader._ownerReadableStream;\n        if (stream._state === 'readable') {\n            defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n        }\n        else {\n            defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));\n        }\n        stream._readableStreamController[ReleaseSteps]();\n        stream._reader = undefined;\n        reader._ownerReadableStream = undefined;\n    }\n    // Helper functions for the readers.\n    function readerLockException(name) {\n        return new TypeError('Cannot ' + name + ' a stream using a released reader');\n    }\n    // Helper functions for the ReadableStreamDefaultReader.\n    function defaultReaderClosedPromiseInitialize(reader) {\n        reader._closedPromise = newPromise((resolve, reject) => {\n            reader._closedPromise_resolve = resolve;\n            reader._closedPromise_reject = reject;\n        });\n    }\n    function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {\n        defaultReaderClosedPromiseInitialize(reader);\n        defaultReaderClosedPromiseReject(reader, reason);\n    }\n    function defaultReaderClosedPromiseInitializeAsResolved(reader) {\n        defaultReaderClosedPromiseInitialize(reader);\n        defaultReaderClosedPromiseResolve(reader);\n    }\n    function defaultReaderClosedPromiseReject(reader, reason) {\n        if (reader._closedPromise_reject === undefined) {\n            return;\n        }\n        setPromiseIsHandledToTrue(reader._closedPromise);\n        reader._closedPromise_reject(reason);\n        reader._closedPromise_resolve = undefined;\n        reader._closedPromise_reject = undefined;\n    }\n    function defaultReaderClosedPromiseResetToRejected(reader, reason) {\n        defaultReaderClosedPromiseInitializeAsRejected(reader, reason);\n    }\n    function defaultReaderClosedPromiseResolve(reader) {\n        if (reader._closedPromise_resolve === undefined) {\n            return;\n        }\n        reader._closedPromise_resolve(undefined);\n        reader._closedPromise_resolve = undefined;\n        reader._closedPromise_reject = undefined;\n    }\n\n    /// <reference lib=\"es2015.core\" />\n    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill\n    const NumberIsFinite = Number.isFinite || function (x) {\n        return typeof x === 'number' && isFinite(x);\n    };\n\n    /// <reference lib=\"es2015.core\" />\n    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill\n    const MathTrunc = Math.trunc || function (v) {\n        return v < 0 ? Math.ceil(v) : Math.floor(v);\n    };\n\n    // https://heycam.github.io/webidl/#idl-dictionaries\n    function isDictionary(x) {\n        return typeof x === 'object' || typeof x === 'function';\n    }\n    function assertDictionary(obj, context) {\n        if (obj !== undefined && !isDictionary(obj)) {\n            throw new TypeError(`${context} is not an object.`);\n        }\n    }\n    // https://heycam.github.io/webidl/#idl-callback-functions\n    function assertFunction(x, context) {\n        if (typeof x !== 'function') {\n            throw new TypeError(`${context} is not a function.`);\n        }\n    }\n    // https://heycam.github.io/webidl/#idl-object\n    function isObject(x) {\n        return (typeof x === 'object' && x !== null) || typeof x === 'function';\n    }\n    function assertObject(x, context) {\n        if (!isObject(x)) {\n            throw new TypeError(`${context} is not an object.`);\n        }\n    }\n    function assertRequiredArgument(x, position, context) {\n        if (x === undefined) {\n            throw new TypeError(`Parameter ${position} is required in '${context}'.`);\n        }\n    }\n    function assertRequiredField(x, field, context) {\n        if (x === undefined) {\n            throw new TypeError(`${field} is required in '${context}'.`);\n        }\n    }\n    // https://heycam.github.io/webidl/#idl-unrestricted-double\n    function convertUnrestrictedDouble(value) {\n        return Number(value);\n    }\n    function censorNegativeZero(x) {\n        return x === 0 ? 0 : x;\n    }\n    function integerPart(x) {\n        return censorNegativeZero(MathTrunc(x));\n    }\n    // https://heycam.github.io/webidl/#idl-unsigned-long-long\n    function convertUnsignedLongLongWithEnforceRange(value, context) {\n        const lowerBound = 0;\n        const upperBound = Number.MAX_SAFE_INTEGER;\n        let x = Number(value);\n        x = censorNegativeZero(x);\n        if (!NumberIsFinite(x)) {\n            throw new TypeError(`${context} is not a finite number`);\n        }\n        x = integerPart(x);\n        if (x < lowerBound || x > upperBound) {\n            throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);\n        }\n        if (!NumberIsFinite(x) || x === 0) {\n            return 0;\n        }\n        // TODO Use BigInt if supported?\n        // let xBigInt = BigInt(integerPart(x));\n        // xBigInt = BigInt.asUintN(64, xBigInt);\n        // return Number(xBigInt);\n        return x;\n    }\n\n    function assertReadableStream(x, context) {\n        if (!IsReadableStream(x)) {\n            throw new TypeError(`${context} is not a ReadableStream.`);\n        }\n    }\n\n    // Abstract operations for the ReadableStream.\n    function AcquireReadableStreamDefaultReader(stream) {\n        return new ReadableStreamDefaultReader(stream);\n    }\n    // ReadableStream API exposed for controllers.\n    function ReadableStreamAddReadRequest(stream, readRequest) {\n        stream._reader._readRequests.push(readRequest);\n    }\n    function ReadableStreamFulfillReadRequest(stream, chunk, done) {\n        const reader = stream._reader;\n        const readRequest = reader._readRequests.shift();\n        if (done) {\n            readRequest._closeSteps();\n        }\n        else {\n            readRequest._chunkSteps(chunk);\n        }\n    }\n    function ReadableStreamGetNumReadRequests(stream) {\n        return stream._reader._readRequests.length;\n    }\n    function ReadableStreamHasDefaultReader(stream) {\n        const reader = stream._reader;\n        if (reader === undefined) {\n            return false;\n        }\n        if (!IsReadableStreamDefaultReader(reader)) {\n            return false;\n        }\n        return true;\n    }\n    /**\n     * A default reader vended by a {@link ReadableStream}.\n     *\n     * @public\n     */\n    class ReadableStreamDefaultReader {\n        constructor(stream) {\n            assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');\n            assertReadableStream(stream, 'First parameter');\n            if (IsReadableStreamLocked(stream)) {\n                throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n            }\n            ReadableStreamReaderGenericInitialize(this, stream);\n            this._readRequests = new SimpleQueue();\n        }\n        /**\n         * Returns a promise that will be fulfilled when the stream becomes closed,\n         * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.\n         */\n        get closed() {\n            if (!IsReadableStreamDefaultReader(this)) {\n                return promiseRejectedWith(defaultReaderBrandCheckException('closed'));\n            }\n            return this._closedPromise;\n        }\n        /**\n         * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n         */\n        cancel(reason = undefined) {\n            if (!IsReadableStreamDefaultReader(this)) {\n                return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));\n            }\n            if (this._ownerReadableStream === undefined) {\n                return promiseRejectedWith(readerLockException('cancel'));\n            }\n            return ReadableStreamReaderGenericCancel(this, reason);\n        }\n        /**\n         * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.\n         *\n         * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.\n         */\n        read() {\n            if (!IsReadableStreamDefaultReader(this)) {\n                return promiseRejectedWith(defaultReaderBrandCheckException('read'));\n            }\n            if (this._ownerReadableStream === undefined) {\n                return promiseRejectedWith(readerLockException('read from'));\n            }\n            let resolvePromise;\n            let rejectPromise;\n            const promise = newPromise((resolve, reject) => {\n                resolvePromise = resolve;\n                rejectPromise = reject;\n            });\n            const readRequest = {\n                _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n                _closeSteps: () => resolvePromise({ value: undefined, done: true }),\n                _errorSteps: e => rejectPromise(e)\n            };\n            ReadableStreamDefaultReaderRead(this, readRequest);\n            return promise;\n        }\n        /**\n         * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n         * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n         * from now on; otherwise, the reader will appear closed.\n         *\n         * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n         * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to\n         * do so will throw a `TypeError` and leave the reader locked to the stream.\n         */\n        releaseLock() {\n            if (!IsReadableStreamDefaultReader(this)) {\n                throw defaultReaderBrandCheckException('releaseLock');\n            }\n            if (this._ownerReadableStream === undefined) {\n                return;\n            }\n            ReadableStreamDefaultReaderRelease(this);\n        }\n    }\n    Object.defineProperties(ReadableStreamDefaultReader.prototype, {\n        cancel: { enumerable: true },\n        read: { enumerable: true },\n        releaseLock: { enumerable: true },\n        closed: { enumerable: true }\n    });\n    setFunctionName(ReadableStreamDefaultReader.prototype.cancel, 'cancel');\n    setFunctionName(ReadableStreamDefaultReader.prototype.read, 'read');\n    setFunctionName(ReadableStreamDefaultReader.prototype.releaseLock, 'releaseLock');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableStreamDefaultReader.prototype, Symbol.toStringTag, {\n            value: 'ReadableStreamDefaultReader',\n            configurable: true\n        });\n    }\n    // Abstract operations for the readers.\n    function IsReadableStreamDefaultReader(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {\n            return false;\n        }\n        return x instanceof ReadableStreamDefaultReader;\n    }\n    function ReadableStreamDefaultReaderRead(reader, readRequest) {\n        const stream = reader._ownerReadableStream;\n        stream._disturbed = true;\n        if (stream._state === 'closed') {\n            readRequest._closeSteps();\n        }\n        else if (stream._state === 'errored') {\n            readRequest._errorSteps(stream._storedError);\n        }\n        else {\n            stream._readableStreamController[PullSteps](readRequest);\n        }\n    }\n    function ReadableStreamDefaultReaderRelease(reader) {\n        ReadableStreamReaderGenericRelease(reader);\n        const e = new TypeError('Reader was released');\n        ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n    }\n    function ReadableStreamDefaultReaderErrorReadRequests(reader, e) {\n        const readRequests = reader._readRequests;\n        reader._readRequests = new SimpleQueue();\n        readRequests.forEach(readRequest => {\n            readRequest._errorSteps(e);\n        });\n    }\n    // Helper functions for the ReadableStreamDefaultReader.\n    function defaultReaderBrandCheckException(name) {\n        return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);\n    }\n\n    /// <reference lib=\"es2018.asynciterable\" />\n    /* eslint-disable @typescript-eslint/no-empty-function */\n    const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () { }).prototype);\n\n    /// <reference lib=\"es2018.asynciterable\" />\n    class ReadableStreamAsyncIteratorImpl {\n        constructor(reader, preventCancel) {\n            this._ongoingPromise = undefined;\n            this._isFinished = false;\n            this._reader = reader;\n            this._preventCancel = preventCancel;\n        }\n        next() {\n            const nextSteps = () => this._nextSteps();\n            this._ongoingPromise = this._ongoingPromise ?\n                transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :\n                nextSteps();\n            return this._ongoingPromise;\n        }\n        return(value) {\n            const returnSteps = () => this._returnSteps(value);\n            return this._ongoingPromise ?\n                transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :\n                returnSteps();\n        }\n        _nextSteps() {\n            if (this._isFinished) {\n                return Promise.resolve({ value: undefined, done: true });\n            }\n            const reader = this._reader;\n            let resolvePromise;\n            let rejectPromise;\n            const promise = newPromise((resolve, reject) => {\n                resolvePromise = resolve;\n                rejectPromise = reject;\n            });\n            const readRequest = {\n                _chunkSteps: chunk => {\n                    this._ongoingPromise = undefined;\n                    // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.\n                    // FIXME Is this a bug in the specification, or in the test?\n                    _queueMicrotask(() => resolvePromise({ value: chunk, done: false }));\n                },\n                _closeSteps: () => {\n                    this._ongoingPromise = undefined;\n                    this._isFinished = true;\n                    ReadableStreamReaderGenericRelease(reader);\n                    resolvePromise({ value: undefined, done: true });\n                },\n                _errorSteps: reason => {\n                    this._ongoingPromise = undefined;\n                    this._isFinished = true;\n                    ReadableStreamReaderGenericRelease(reader);\n                    rejectPromise(reason);\n                }\n            };\n            ReadableStreamDefaultReaderRead(reader, readRequest);\n            return promise;\n        }\n        _returnSteps(value) {\n            if (this._isFinished) {\n                return Promise.resolve({ value, done: true });\n            }\n            this._isFinished = true;\n            const reader = this._reader;\n            if (!this._preventCancel) {\n                const result = ReadableStreamReaderGenericCancel(reader, value);\n                ReadableStreamReaderGenericRelease(reader);\n                return transformPromiseWith(result, () => ({ value, done: true }));\n            }\n            ReadableStreamReaderGenericRelease(reader);\n            return promiseResolvedWith({ value, done: true });\n        }\n    }\n    const ReadableStreamAsyncIteratorPrototype = {\n        next() {\n            if (!IsReadableStreamAsyncIterator(this)) {\n                return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));\n            }\n            return this._asyncIteratorImpl.next();\n        },\n        return(value) {\n            if (!IsReadableStreamAsyncIterator(this)) {\n                return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));\n            }\n            return this._asyncIteratorImpl.return(value);\n        }\n    };\n    Object.setPrototypeOf(ReadableStreamAsyncIteratorPrototype, AsyncIteratorPrototype);\n    // Abstract operations for the ReadableStream.\n    function AcquireReadableStreamAsyncIterator(stream, preventCancel) {\n        const reader = AcquireReadableStreamDefaultReader(stream);\n        const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);\n        const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);\n        iterator._asyncIteratorImpl = impl;\n        return iterator;\n    }\n    function IsReadableStreamAsyncIterator(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {\n            return false;\n        }\n        try {\n            // noinspection SuspiciousTypeOfGuard\n            return x._asyncIteratorImpl instanceof\n                ReadableStreamAsyncIteratorImpl;\n        }\n        catch (_a) {\n            return false;\n        }\n    }\n    // Helper functions for the ReadableStream.\n    function streamAsyncIteratorBrandCheckException(name) {\n        return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);\n    }\n\n    /// <reference lib=\"es2015.core\" />\n    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill\n    const NumberIsNaN = Number.isNaN || function (x) {\n        // eslint-disable-next-line no-self-compare\n        return x !== x;\n    };\n\n    var _a, _b, _c;\n    function CreateArrayFromList(elements) {\n        // We use arrays to represent lists, so this is basically a no-op.\n        // Do a slice though just in case we happen to depend on the unique-ness.\n        return elements.slice();\n    }\n    function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) {\n        new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);\n    }\n    let TransferArrayBuffer = (O) => {\n        if (typeof O.transfer === 'function') {\n            TransferArrayBuffer = buffer => buffer.transfer();\n        }\n        else if (typeof structuredClone === 'function') {\n            TransferArrayBuffer = buffer => structuredClone(buffer, { transfer: [buffer] });\n        }\n        else {\n            // Not implemented correctly\n            TransferArrayBuffer = buffer => buffer;\n        }\n        return TransferArrayBuffer(O);\n    };\n    let IsDetachedBuffer = (O) => {\n        if (typeof O.detached === 'boolean') {\n            IsDetachedBuffer = buffer => buffer.detached;\n        }\n        else {\n            // Not implemented correctly\n            IsDetachedBuffer = buffer => buffer.byteLength === 0;\n        }\n        return IsDetachedBuffer(O);\n    };\n    function ArrayBufferSlice(buffer, begin, end) {\n        // ArrayBuffer.prototype.slice is not available on IE10\n        // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice\n        if (buffer.slice) {\n            return buffer.slice(begin, end);\n        }\n        const length = end - begin;\n        const slice = new ArrayBuffer(length);\n        CopyDataBlockBytes(slice, 0, buffer, begin, length);\n        return slice;\n    }\n    function GetMethod(receiver, prop) {\n        const func = receiver[prop];\n        if (func === undefined || func === null) {\n            return undefined;\n        }\n        if (typeof func !== 'function') {\n            throw new TypeError(`${String(prop)} is not a function`);\n        }\n        return func;\n    }\n    function CreateAsyncFromSyncIterator(syncIteratorRecord) {\n        // Instead of re-implementing CreateAsyncFromSyncIterator and %AsyncFromSyncIteratorPrototype%,\n        // we use yield* inside an async generator function to achieve the same result.\n        // Wrap the sync iterator inside a sync iterable, so we can use it with yield*.\n        const syncIterable = {\n            [Symbol.iterator]: () => syncIteratorRecord.iterator\n        };\n        // Create an async generator function and immediately invoke it.\n        const asyncIterator = (async function* () {\n            return yield* syncIterable;\n        }());\n        // Return as an async iterator record.\n        const nextMethod = asyncIterator.next;\n        return { iterator: asyncIterator, nextMethod, done: false };\n    }\n    // Aligns with core-js/modules/es.symbol.async-iterator.js\n    const SymbolAsyncIterator = (_c = (_a = Symbol.asyncIterator) !== null && _a !== void 0 ? _a : (_b = Symbol.for) === null || _b === void 0 ? void 0 : _b.call(Symbol, 'Symbol.asyncIterator')) !== null && _c !== void 0 ? _c : '@@asyncIterator';\n    function GetIterator(obj, hint = 'sync', method) {\n        if (method === undefined) {\n            if (hint === 'async') {\n                method = GetMethod(obj, SymbolAsyncIterator);\n                if (method === undefined) {\n                    const syncMethod = GetMethod(obj, Symbol.iterator);\n                    const syncIteratorRecord = GetIterator(obj, 'sync', syncMethod);\n                    return CreateAsyncFromSyncIterator(syncIteratorRecord);\n                }\n            }\n            else {\n                method = GetMethod(obj, Symbol.iterator);\n            }\n        }\n        if (method === undefined) {\n            throw new TypeError('The object is not iterable');\n        }\n        const iterator = reflectCall(method, obj, []);\n        if (!typeIsObject(iterator)) {\n            throw new TypeError('The iterator method must return an object');\n        }\n        const nextMethod = iterator.next;\n        return { iterator, nextMethod, done: false };\n    }\n    function IteratorNext(iteratorRecord) {\n        const result = reflectCall(iteratorRecord.nextMethod, iteratorRecord.iterator, []);\n        if (!typeIsObject(result)) {\n            throw new TypeError('The iterator.next() method must return an object');\n        }\n        return result;\n    }\n    function IteratorComplete(iterResult) {\n        return Boolean(iterResult.done);\n    }\n    function IteratorValue(iterResult) {\n        return iterResult.value;\n    }\n\n    function IsNonNegativeNumber(v) {\n        if (typeof v !== 'number') {\n            return false;\n        }\n        if (NumberIsNaN(v)) {\n            return false;\n        }\n        if (v < 0) {\n            return false;\n        }\n        return true;\n    }\n    function CloneAsUint8Array(O) {\n        const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);\n        return new Uint8Array(buffer);\n    }\n\n    function DequeueValue(container) {\n        const pair = container._queue.shift();\n        container._queueTotalSize -= pair.size;\n        if (container._queueTotalSize < 0) {\n            container._queueTotalSize = 0;\n        }\n        return pair.value;\n    }\n    function EnqueueValueWithSize(container, value, size) {\n        if (!IsNonNegativeNumber(size) || size === Infinity) {\n            throw new RangeError('Size must be a finite, non-NaN, non-negative number.');\n        }\n        container._queue.push({ value, size });\n        container._queueTotalSize += size;\n    }\n    function PeekQueueValue(container) {\n        const pair = container._queue.peek();\n        return pair.value;\n    }\n    function ResetQueue(container) {\n        container._queue = new SimpleQueue();\n        container._queueTotalSize = 0;\n    }\n\n    function isDataViewConstructor(ctor) {\n        return ctor === DataView;\n    }\n    function isDataView(view) {\n        return isDataViewConstructor(view.constructor);\n    }\n    function arrayBufferViewElementSize(ctor) {\n        if (isDataViewConstructor(ctor)) {\n            return 1;\n        }\n        return ctor.BYTES_PER_ELEMENT;\n    }\n\n    /**\n     * A pull-into request in a {@link ReadableByteStreamController}.\n     *\n     * @public\n     */\n    class ReadableStreamBYOBRequest {\n        constructor() {\n            throw new TypeError('Illegal constructor');\n        }\n        /**\n         * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.\n         */\n        get view() {\n            if (!IsReadableStreamBYOBRequest(this)) {\n                throw byobRequestBrandCheckException('view');\n            }\n            return this._view;\n        }\n        respond(bytesWritten) {\n            if (!IsReadableStreamBYOBRequest(this)) {\n                throw byobRequestBrandCheckException('respond');\n            }\n            assertRequiredArgument(bytesWritten, 1, 'respond');\n            bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');\n            if (this._associatedReadableByteStreamController === undefined) {\n                throw new TypeError('This BYOB request has been invalidated');\n            }\n            if (IsDetachedBuffer(this._view.buffer)) {\n                throw new TypeError(`The BYOB request's buffer has been detached and so cannot be used as a response`);\n            }\n            ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);\n        }\n        respondWithNewView(view) {\n            if (!IsReadableStreamBYOBRequest(this)) {\n                throw byobRequestBrandCheckException('respondWithNewView');\n            }\n            assertRequiredArgument(view, 1, 'respondWithNewView');\n            if (!ArrayBuffer.isView(view)) {\n                throw new TypeError('You can only respond with array buffer views');\n            }\n            if (this._associatedReadableByteStreamController === undefined) {\n                throw new TypeError('This BYOB request has been invalidated');\n            }\n            if (IsDetachedBuffer(view.buffer)) {\n                throw new TypeError('The given view\\'s buffer has been detached and so cannot be used as a response');\n            }\n            ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);\n        }\n    }\n    Object.defineProperties(ReadableStreamBYOBRequest.prototype, {\n        respond: { enumerable: true },\n        respondWithNewView: { enumerable: true },\n        view: { enumerable: true }\n    });\n    setFunctionName(ReadableStreamBYOBRequest.prototype.respond, 'respond');\n    setFunctionName(ReadableStreamBYOBRequest.prototype.respondWithNewView, 'respondWithNewView');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableStreamBYOBRequest.prototype, Symbol.toStringTag, {\n            value: 'ReadableStreamBYOBRequest',\n            configurable: true\n        });\n    }\n    /**\n     * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.\n     *\n     * @public\n     */\n    class ReadableByteStreamController {\n        constructor() {\n            throw new TypeError('Illegal constructor');\n        }\n        /**\n         * Returns the current BYOB pull request, or `null` if there isn't one.\n         */\n        get byobRequest() {\n            if (!IsReadableByteStreamController(this)) {\n                throw byteStreamControllerBrandCheckException('byobRequest');\n            }\n            return ReadableByteStreamControllerGetBYOBRequest(this);\n        }\n        /**\n         * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n         * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.\n         */\n        get desiredSize() {\n            if (!IsReadableByteStreamController(this)) {\n                throw byteStreamControllerBrandCheckException('desiredSize');\n            }\n            return ReadableByteStreamControllerGetDesiredSize(this);\n        }\n        /**\n         * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n         * the stream, but once those are read, the stream will become closed.\n         */\n        close() {\n            if (!IsReadableByteStreamController(this)) {\n                throw byteStreamControllerBrandCheckException('close');\n            }\n            if (this._closeRequested) {\n                throw new TypeError('The stream has already been closed; do not close it again!');\n            }\n            const state = this._controlledReadableByteStream._state;\n            if (state !== 'readable') {\n                throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);\n            }\n            ReadableByteStreamControllerClose(this);\n        }\n        enqueue(chunk) {\n            if (!IsReadableByteStreamController(this)) {\n                throw byteStreamControllerBrandCheckException('enqueue');\n            }\n            assertRequiredArgument(chunk, 1, 'enqueue');\n            if (!ArrayBuffer.isView(chunk)) {\n                throw new TypeError('chunk must be an array buffer view');\n            }\n            if (chunk.byteLength === 0) {\n                throw new TypeError('chunk must have non-zero byteLength');\n            }\n            if (chunk.buffer.byteLength === 0) {\n                throw new TypeError(`chunk's buffer must have non-zero byteLength`);\n            }\n            if (this._closeRequested) {\n                throw new TypeError('stream is closed or draining');\n            }\n            const state = this._controlledReadableByteStream._state;\n            if (state !== 'readable') {\n                throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);\n            }\n            ReadableByteStreamControllerEnqueue(this, chunk);\n        }\n        /**\n         * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n         */\n        error(e = undefined) {\n            if (!IsReadableByteStreamController(this)) {\n                throw byteStreamControllerBrandCheckException('error');\n            }\n            ReadableByteStreamControllerError(this, e);\n        }\n        /** @internal */\n        [CancelSteps](reason) {\n            ReadableByteStreamControllerClearPendingPullIntos(this);\n            ResetQueue(this);\n            const result = this._cancelAlgorithm(reason);\n            ReadableByteStreamControllerClearAlgorithms(this);\n            return result;\n        }\n        /** @internal */\n        [PullSteps](readRequest) {\n            const stream = this._controlledReadableByteStream;\n            if (this._queueTotalSize > 0) {\n                ReadableByteStreamControllerFillReadRequestFromQueue(this, readRequest);\n                return;\n            }\n            const autoAllocateChunkSize = this._autoAllocateChunkSize;\n            if (autoAllocateChunkSize !== undefined) {\n                let buffer;\n                try {\n                    buffer = new ArrayBuffer(autoAllocateChunkSize);\n                }\n                catch (bufferE) {\n                    readRequest._errorSteps(bufferE);\n                    return;\n                }\n                const pullIntoDescriptor = {\n                    buffer,\n                    bufferByteLength: autoAllocateChunkSize,\n                    byteOffset: 0,\n                    byteLength: autoAllocateChunkSize,\n                    bytesFilled: 0,\n                    minimumFill: 1,\n                    elementSize: 1,\n                    viewConstructor: Uint8Array,\n                    readerType: 'default'\n                };\n                this._pendingPullIntos.push(pullIntoDescriptor);\n            }\n            ReadableStreamAddReadRequest(stream, readRequest);\n            ReadableByteStreamControllerCallPullIfNeeded(this);\n        }\n        /** @internal */\n        [ReleaseSteps]() {\n            if (this._pendingPullIntos.length > 0) {\n                const firstPullInto = this._pendingPullIntos.peek();\n                firstPullInto.readerType = 'none';\n                this._pendingPullIntos = new SimpleQueue();\n                this._pendingPullIntos.push(firstPullInto);\n            }\n        }\n    }\n    Object.defineProperties(ReadableByteStreamController.prototype, {\n        close: { enumerable: true },\n        enqueue: { enumerable: true },\n        error: { enumerable: true },\n        byobRequest: { enumerable: true },\n        desiredSize: { enumerable: true }\n    });\n    setFunctionName(ReadableByteStreamController.prototype.close, 'close');\n    setFunctionName(ReadableByteStreamController.prototype.enqueue, 'enqueue');\n    setFunctionName(ReadableByteStreamController.prototype.error, 'error');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableByteStreamController.prototype, Symbol.toStringTag, {\n            value: 'ReadableByteStreamController',\n            configurable: true\n        });\n    }\n    // Abstract operations for the ReadableByteStreamController.\n    function IsReadableByteStreamController(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {\n            return false;\n        }\n        return x instanceof ReadableByteStreamController;\n    }\n    function IsReadableStreamBYOBRequest(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {\n            return false;\n        }\n        return x instanceof ReadableStreamBYOBRequest;\n    }\n    function ReadableByteStreamControllerCallPullIfNeeded(controller) {\n        const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);\n        if (!shouldPull) {\n            return;\n        }\n        if (controller._pulling) {\n            controller._pullAgain = true;\n            return;\n        }\n        controller._pulling = true;\n        // TODO: Test controller argument\n        const pullPromise = controller._pullAlgorithm();\n        uponPromise(pullPromise, () => {\n            controller._pulling = false;\n            if (controller._pullAgain) {\n                controller._pullAgain = false;\n                ReadableByteStreamControllerCallPullIfNeeded(controller);\n            }\n            return null;\n        }, e => {\n            ReadableByteStreamControllerError(controller, e);\n            return null;\n        });\n    }\n    function ReadableByteStreamControllerClearPendingPullIntos(controller) {\n        ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n        controller._pendingPullIntos = new SimpleQueue();\n    }\n    function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {\n        let done = false;\n        if (stream._state === 'closed') {\n            done = true;\n        }\n        const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n        if (pullIntoDescriptor.readerType === 'default') {\n            ReadableStreamFulfillReadRequest(stream, filledView, done);\n        }\n        else {\n            ReadableStreamFulfillReadIntoRequest(stream, filledView, done);\n        }\n    }\n    function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {\n        const bytesFilled = pullIntoDescriptor.bytesFilled;\n        const elementSize = pullIntoDescriptor.elementSize;\n        return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);\n    }\n    function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {\n        controller._queue.push({ buffer, byteOffset, byteLength });\n        controller._queueTotalSize += byteLength;\n    }\n    function ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, buffer, byteOffset, byteLength) {\n        let clonedChunk;\n        try {\n            clonedChunk = ArrayBufferSlice(buffer, byteOffset, byteOffset + byteLength);\n        }\n        catch (cloneE) {\n            ReadableByteStreamControllerError(controller, cloneE);\n            throw cloneE;\n        }\n        ReadableByteStreamControllerEnqueueChunkToQueue(controller, clonedChunk, 0, byteLength);\n    }\n    function ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstDescriptor) {\n        if (firstDescriptor.bytesFilled > 0) {\n            ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, firstDescriptor.buffer, firstDescriptor.byteOffset, firstDescriptor.bytesFilled);\n        }\n        ReadableByteStreamControllerShiftPendingPullInto(controller);\n    }\n    function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {\n        const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);\n        const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;\n        let totalBytesToCopyRemaining = maxBytesToCopy;\n        let ready = false;\n        const remainderBytes = maxBytesFilled % pullIntoDescriptor.elementSize;\n        const maxAlignedBytes = maxBytesFilled - remainderBytes;\n        // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n        // of the queue, so the underlying source can keep filling it.\n        if (maxAlignedBytes >= pullIntoDescriptor.minimumFill) {\n            totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;\n            ready = true;\n        }\n        const queue = controller._queue;\n        while (totalBytesToCopyRemaining > 0) {\n            const headOfQueue = queue.peek();\n            const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);\n            const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n            CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);\n            if (headOfQueue.byteLength === bytesToCopy) {\n                queue.shift();\n            }\n            else {\n                headOfQueue.byteOffset += bytesToCopy;\n                headOfQueue.byteLength -= bytesToCopy;\n            }\n            controller._queueTotalSize -= bytesToCopy;\n            ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);\n            totalBytesToCopyRemaining -= bytesToCopy;\n        }\n        return ready;\n    }\n    function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {\n        pullIntoDescriptor.bytesFilled += size;\n    }\n    function ReadableByteStreamControllerHandleQueueDrain(controller) {\n        if (controller._queueTotalSize === 0 && controller._closeRequested) {\n            ReadableByteStreamControllerClearAlgorithms(controller);\n            ReadableStreamClose(controller._controlledReadableByteStream);\n        }\n        else {\n            ReadableByteStreamControllerCallPullIfNeeded(controller);\n        }\n    }\n    function ReadableByteStreamControllerInvalidateBYOBRequest(controller) {\n        if (controller._byobRequest === null) {\n            return;\n        }\n        controller._byobRequest._associatedReadableByteStreamController = undefined;\n        controller._byobRequest._view = null;\n        controller._byobRequest = null;\n    }\n    function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {\n        while (controller._pendingPullIntos.length > 0) {\n            if (controller._queueTotalSize === 0) {\n                return;\n            }\n            const pullIntoDescriptor = controller._pendingPullIntos.peek();\n            if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n                ReadableByteStreamControllerShiftPendingPullInto(controller);\n                ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n            }\n        }\n    }\n    function ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller) {\n        const reader = controller._controlledReadableByteStream._reader;\n        while (reader._readRequests.length > 0) {\n            if (controller._queueTotalSize === 0) {\n                return;\n            }\n            const readRequest = reader._readRequests.shift();\n            ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest);\n        }\n    }\n    function ReadableByteStreamControllerPullInto(controller, view, min, readIntoRequest) {\n        const stream = controller._controlledReadableByteStream;\n        const ctor = view.constructor;\n        const elementSize = arrayBufferViewElementSize(ctor);\n        const { byteOffset, byteLength } = view;\n        const minimumFill = min * elementSize;\n        let buffer;\n        try {\n            buffer = TransferArrayBuffer(view.buffer);\n        }\n        catch (e) {\n            readIntoRequest._errorSteps(e);\n            return;\n        }\n        const pullIntoDescriptor = {\n            buffer,\n            bufferByteLength: buffer.byteLength,\n            byteOffset,\n            byteLength,\n            bytesFilled: 0,\n            minimumFill,\n            elementSize,\n            viewConstructor: ctor,\n            readerType: 'byob'\n        };\n        if (controller._pendingPullIntos.length > 0) {\n            controller._pendingPullIntos.push(pullIntoDescriptor);\n            // No ReadableByteStreamControllerCallPullIfNeeded() call since:\n            // - No change happens on desiredSize\n            // - The source has already been notified of that there's at least 1 pending read(view)\n            ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n            return;\n        }\n        if (stream._state === 'closed') {\n            const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);\n            readIntoRequest._closeSteps(emptyView);\n            return;\n        }\n        if (controller._queueTotalSize > 0) {\n            if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {\n                const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);\n                ReadableByteStreamControllerHandleQueueDrain(controller);\n                readIntoRequest._chunkSteps(filledView);\n                return;\n            }\n            if (controller._closeRequested) {\n                const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n                ReadableByteStreamControllerError(controller, e);\n                readIntoRequest._errorSteps(e);\n                return;\n            }\n        }\n        controller._pendingPullIntos.push(pullIntoDescriptor);\n        ReadableStreamAddReadIntoRequest(stream, readIntoRequest);\n        ReadableByteStreamControllerCallPullIfNeeded(controller);\n    }\n    function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {\n        if (firstDescriptor.readerType === 'none') {\n            ReadableByteStreamControllerShiftPendingPullInto(controller);\n        }\n        const stream = controller._controlledReadableByteStream;\n        if (ReadableStreamHasBYOBReader(stream)) {\n            while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n                const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);\n                ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);\n            }\n        }\n    }\n    function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {\n        ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);\n        if (pullIntoDescriptor.readerType === 'none') {\n            ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, pullIntoDescriptor);\n            ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n            return;\n        }\n        if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.minimumFill) {\n            // A descriptor for a read() request that is not yet filled up to its minimum length will stay at the head\n            // of the queue, so the underlying source can keep filling it.\n            return;\n        }\n        ReadableByteStreamControllerShiftPendingPullInto(controller);\n        const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;\n        if (remainderSize > 0) {\n            const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;\n            ReadableByteStreamControllerEnqueueClonedChunkToQueue(controller, pullIntoDescriptor.buffer, end - remainderSize, remainderSize);\n        }\n        pullIntoDescriptor.bytesFilled -= remainderSize;\n        ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);\n        ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n    }\n    function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {\n        const firstDescriptor = controller._pendingPullIntos.peek();\n        ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n        const state = controller._controlledReadableByteStream._state;\n        if (state === 'closed') {\n            ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor);\n        }\n        else {\n            ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);\n        }\n        ReadableByteStreamControllerCallPullIfNeeded(controller);\n    }\n    function ReadableByteStreamControllerShiftPendingPullInto(controller) {\n        const descriptor = controller._pendingPullIntos.shift();\n        return descriptor;\n    }\n    function ReadableByteStreamControllerShouldCallPull(controller) {\n        const stream = controller._controlledReadableByteStream;\n        if (stream._state !== 'readable') {\n            return false;\n        }\n        if (controller._closeRequested) {\n            return false;\n        }\n        if (!controller._started) {\n            return false;\n        }\n        if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n            return true;\n        }\n        if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {\n            return true;\n        }\n        const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);\n        if (desiredSize > 0) {\n            return true;\n        }\n        return false;\n    }\n    function ReadableByteStreamControllerClearAlgorithms(controller) {\n        controller._pullAlgorithm = undefined;\n        controller._cancelAlgorithm = undefined;\n    }\n    // A client of ReadableByteStreamController may use these functions directly to bypass state check.\n    function ReadableByteStreamControllerClose(controller) {\n        const stream = controller._controlledReadableByteStream;\n        if (controller._closeRequested || stream._state !== 'readable') {\n            return;\n        }\n        if (controller._queueTotalSize > 0) {\n            controller._closeRequested = true;\n            return;\n        }\n        if (controller._pendingPullIntos.length > 0) {\n            const firstPendingPullInto = controller._pendingPullIntos.peek();\n            if (firstPendingPullInto.bytesFilled % firstPendingPullInto.elementSize !== 0) {\n                const e = new TypeError('Insufficient bytes to fill elements in the given buffer');\n                ReadableByteStreamControllerError(controller, e);\n                throw e;\n            }\n        }\n        ReadableByteStreamControllerClearAlgorithms(controller);\n        ReadableStreamClose(stream);\n    }\n    function ReadableByteStreamControllerEnqueue(controller, chunk) {\n        const stream = controller._controlledReadableByteStream;\n        if (controller._closeRequested || stream._state !== 'readable') {\n            return;\n        }\n        const { buffer, byteOffset, byteLength } = chunk;\n        if (IsDetachedBuffer(buffer)) {\n            throw new TypeError('chunk\\'s buffer is detached and so cannot be enqueued');\n        }\n        const transferredBuffer = TransferArrayBuffer(buffer);\n        if (controller._pendingPullIntos.length > 0) {\n            const firstPendingPullInto = controller._pendingPullIntos.peek();\n            if (IsDetachedBuffer(firstPendingPullInto.buffer)) {\n                throw new TypeError('The BYOB request\\'s buffer has been detached and so cannot be filled with an enqueued chunk');\n            }\n            ReadableByteStreamControllerInvalidateBYOBRequest(controller);\n            firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);\n            if (firstPendingPullInto.readerType === 'none') {\n                ReadableByteStreamControllerEnqueueDetachedPullIntoToQueue(controller, firstPendingPullInto);\n            }\n        }\n        if (ReadableStreamHasDefaultReader(stream)) {\n            ReadableByteStreamControllerProcessReadRequestsUsingQueue(controller);\n            if (ReadableStreamGetNumReadRequests(stream) === 0) {\n                ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n            }\n            else {\n                if (controller._pendingPullIntos.length > 0) {\n                    ReadableByteStreamControllerShiftPendingPullInto(controller);\n                }\n                const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);\n                ReadableStreamFulfillReadRequest(stream, transferredView, false);\n            }\n        }\n        else if (ReadableStreamHasBYOBReader(stream)) {\n            // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.\n            ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n            ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);\n        }\n        else {\n            ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);\n        }\n        ReadableByteStreamControllerCallPullIfNeeded(controller);\n    }\n    function ReadableByteStreamControllerError(controller, e) {\n        const stream = controller._controlledReadableByteStream;\n        if (stream._state !== 'readable') {\n            return;\n        }\n        ReadableByteStreamControllerClearPendingPullIntos(controller);\n        ResetQueue(controller);\n        ReadableByteStreamControllerClearAlgorithms(controller);\n        ReadableStreamError(stream, e);\n    }\n    function ReadableByteStreamControllerFillReadRequestFromQueue(controller, readRequest) {\n        const entry = controller._queue.shift();\n        controller._queueTotalSize -= entry.byteLength;\n        ReadableByteStreamControllerHandleQueueDrain(controller);\n        const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);\n        readRequest._chunkSteps(view);\n    }\n    function ReadableByteStreamControllerGetBYOBRequest(controller) {\n        if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {\n            const firstDescriptor = controller._pendingPullIntos.peek();\n            const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled);\n            const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype);\n            SetUpReadableStreamBYOBRequest(byobRequest, controller, view);\n            controller._byobRequest = byobRequest;\n        }\n        return controller._byobRequest;\n    }\n    function ReadableByteStreamControllerGetDesiredSize(controller) {\n        const state = controller._controlledReadableByteStream._state;\n        if (state === 'errored') {\n            return null;\n        }\n        if (state === 'closed') {\n            return 0;\n        }\n        return controller._strategyHWM - controller._queueTotalSize;\n    }\n    function ReadableByteStreamControllerRespond(controller, bytesWritten) {\n        const firstDescriptor = controller._pendingPullIntos.peek();\n        const state = controller._controlledReadableByteStream._state;\n        if (state === 'closed') {\n            if (bytesWritten !== 0) {\n                throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');\n            }\n        }\n        else {\n            if (bytesWritten === 0) {\n                throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');\n            }\n            if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {\n                throw new RangeError('bytesWritten out of range');\n            }\n        }\n        firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);\n        ReadableByteStreamControllerRespondInternal(controller, bytesWritten);\n    }\n    function ReadableByteStreamControllerRespondWithNewView(controller, view) {\n        const firstDescriptor = controller._pendingPullIntos.peek();\n        const state = controller._controlledReadableByteStream._state;\n        if (state === 'closed') {\n            if (view.byteLength !== 0) {\n                throw new TypeError('The view\\'s length must be 0 when calling respondWithNewView() on a closed stream');\n            }\n        }\n        else {\n            if (view.byteLength === 0) {\n                throw new TypeError('The view\\'s length must be greater than 0 when calling respondWithNewView() on a readable stream');\n            }\n        }\n        if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {\n            throw new RangeError('The region specified by view does not match byobRequest');\n        }\n        if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {\n            throw new RangeError('The buffer of view has different capacity than byobRequest');\n        }\n        if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {\n            throw new RangeError('The region specified by view is larger than byobRequest');\n        }\n        const viewByteLength = view.byteLength;\n        firstDescriptor.buffer = TransferArrayBuffer(view.buffer);\n        ReadableByteStreamControllerRespondInternal(controller, viewByteLength);\n    }\n    function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) {\n        controller._controlledReadableByteStream = stream;\n        controller._pullAgain = false;\n        controller._pulling = false;\n        controller._byobRequest = null;\n        // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n        controller._queue = controller._queueTotalSize = undefined;\n        ResetQueue(controller);\n        controller._closeRequested = false;\n        controller._started = false;\n        controller._strategyHWM = highWaterMark;\n        controller._pullAlgorithm = pullAlgorithm;\n        controller._cancelAlgorithm = cancelAlgorithm;\n        controller._autoAllocateChunkSize = autoAllocateChunkSize;\n        controller._pendingPullIntos = new SimpleQueue();\n        stream._readableStreamController = controller;\n        const startResult = startAlgorithm();\n        uponPromise(promiseResolvedWith(startResult), () => {\n            controller._started = true;\n            ReadableByteStreamControllerCallPullIfNeeded(controller);\n            return null;\n        }, r => {\n            ReadableByteStreamControllerError(controller, r);\n            return null;\n        });\n    }\n    function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) {\n        const controller = Object.create(ReadableByteStreamController.prototype);\n        let startAlgorithm;\n        let pullAlgorithm;\n        let cancelAlgorithm;\n        if (underlyingByteSource.start !== undefined) {\n            startAlgorithm = () => underlyingByteSource.start(controller);\n        }\n        else {\n            startAlgorithm = () => undefined;\n        }\n        if (underlyingByteSource.pull !== undefined) {\n            pullAlgorithm = () => underlyingByteSource.pull(controller);\n        }\n        else {\n            pullAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        if (underlyingByteSource.cancel !== undefined) {\n            cancelAlgorithm = reason => underlyingByteSource.cancel(reason);\n        }\n        else {\n            cancelAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;\n        if (autoAllocateChunkSize === 0) {\n            throw new TypeError('autoAllocateChunkSize must be greater than 0');\n        }\n        SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize);\n    }\n    function SetUpReadableStreamBYOBRequest(request, controller, view) {\n        request._associatedReadableByteStreamController = controller;\n        request._view = view;\n    }\n    // Helper functions for the ReadableStreamBYOBRequest.\n    function byobRequestBrandCheckException(name) {\n        return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);\n    }\n    // Helper functions for the ReadableByteStreamController.\n    function byteStreamControllerBrandCheckException(name) {\n        return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);\n    }\n\n    function convertReaderOptions(options, context) {\n        assertDictionary(options, context);\n        const mode = options === null || options === void 0 ? void 0 : options.mode;\n        return {\n            mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)\n        };\n    }\n    function convertReadableStreamReaderMode(mode, context) {\n        mode = `${mode}`;\n        if (mode !== 'byob') {\n            throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);\n        }\n        return mode;\n    }\n    function convertByobReadOptions(options, context) {\n        var _a;\n        assertDictionary(options, context);\n        const min = (_a = options === null || options === void 0 ? void 0 : options.min) !== null && _a !== void 0 ? _a : 1;\n        return {\n            min: convertUnsignedLongLongWithEnforceRange(min, `${context} has member 'min' that`)\n        };\n    }\n\n    // Abstract operations for the ReadableStream.\n    function AcquireReadableStreamBYOBReader(stream) {\n        return new ReadableStreamBYOBReader(stream);\n    }\n    // ReadableStream API exposed for controllers.\n    function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) {\n        stream._reader._readIntoRequests.push(readIntoRequest);\n    }\n    function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) {\n        const reader = stream._reader;\n        const readIntoRequest = reader._readIntoRequests.shift();\n        if (done) {\n            readIntoRequest._closeSteps(chunk);\n        }\n        else {\n            readIntoRequest._chunkSteps(chunk);\n        }\n    }\n    function ReadableStreamGetNumReadIntoRequests(stream) {\n        return stream._reader._readIntoRequests.length;\n    }\n    function ReadableStreamHasBYOBReader(stream) {\n        const reader = stream._reader;\n        if (reader === undefined) {\n            return false;\n        }\n        if (!IsReadableStreamBYOBReader(reader)) {\n            return false;\n        }\n        return true;\n    }\n    /**\n     * A BYOB reader vended by a {@link ReadableStream}.\n     *\n     * @public\n     */\n    class ReadableStreamBYOBReader {\n        constructor(stream) {\n            assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');\n            assertReadableStream(stream, 'First parameter');\n            if (IsReadableStreamLocked(stream)) {\n                throw new TypeError('This stream has already been locked for exclusive reading by another reader');\n            }\n            if (!IsReadableByteStreamController(stream._readableStreamController)) {\n                throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +\n                    'source');\n            }\n            ReadableStreamReaderGenericInitialize(this, stream);\n            this._readIntoRequests = new SimpleQueue();\n        }\n        /**\n         * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n         * the reader's lock is released before the stream finishes closing.\n         */\n        get closed() {\n            if (!IsReadableStreamBYOBReader(this)) {\n                return promiseRejectedWith(byobReaderBrandCheckException('closed'));\n            }\n            return this._closedPromise;\n        }\n        /**\n         * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.\n         */\n        cancel(reason = undefined) {\n            if (!IsReadableStreamBYOBReader(this)) {\n                return promiseRejectedWith(byobReaderBrandCheckException('cancel'));\n            }\n            if (this._ownerReadableStream === undefined) {\n                return promiseRejectedWith(readerLockException('cancel'));\n            }\n            return ReadableStreamReaderGenericCancel(this, reason);\n        }\n        read(view, rawOptions = {}) {\n            if (!IsReadableStreamBYOBReader(this)) {\n                return promiseRejectedWith(byobReaderBrandCheckException('read'));\n            }\n            if (!ArrayBuffer.isView(view)) {\n                return promiseRejectedWith(new TypeError('view must be an array buffer view'));\n            }\n            if (view.byteLength === 0) {\n                return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));\n            }\n            if (view.buffer.byteLength === 0) {\n                return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));\n            }\n            if (IsDetachedBuffer(view.buffer)) {\n                return promiseRejectedWith(new TypeError('view\\'s buffer has been detached'));\n            }\n            let options;\n            try {\n                options = convertByobReadOptions(rawOptions, 'options');\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            const min = options.min;\n            if (min === 0) {\n                return promiseRejectedWith(new TypeError('options.min must be greater than 0'));\n            }\n            if (!isDataView(view)) {\n                if (min > view.length) {\n                    return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s length'));\n                }\n            }\n            else if (min > view.byteLength) {\n                return promiseRejectedWith(new RangeError('options.min must be less than or equal to view\\'s byteLength'));\n            }\n            if (this._ownerReadableStream === undefined) {\n                return promiseRejectedWith(readerLockException('read from'));\n            }\n            let resolvePromise;\n            let rejectPromise;\n            const promise = newPromise((resolve, reject) => {\n                resolvePromise = resolve;\n                rejectPromise = reject;\n            });\n            const readIntoRequest = {\n                _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),\n                _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),\n                _errorSteps: e => rejectPromise(e)\n            };\n            ReadableStreamBYOBReaderRead(this, view, min, readIntoRequest);\n            return promise;\n        }\n        /**\n         * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.\n         * If the associated stream is errored when the lock is released, the reader will appear errored in the same way\n         * from now on; otherwise, the reader will appear closed.\n         *\n         * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by\n         * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to\n         * do so will throw a `TypeError` and leave the reader locked to the stream.\n         */\n        releaseLock() {\n            if (!IsReadableStreamBYOBReader(this)) {\n                throw byobReaderBrandCheckException('releaseLock');\n            }\n            if (this._ownerReadableStream === undefined) {\n                return;\n            }\n            ReadableStreamBYOBReaderRelease(this);\n        }\n    }\n    Object.defineProperties(ReadableStreamBYOBReader.prototype, {\n        cancel: { enumerable: true },\n        read: { enumerable: true },\n        releaseLock: { enumerable: true },\n        closed: { enumerable: true }\n    });\n    setFunctionName(ReadableStreamBYOBReader.prototype.cancel, 'cancel');\n    setFunctionName(ReadableStreamBYOBReader.prototype.read, 'read');\n    setFunctionName(ReadableStreamBYOBReader.prototype.releaseLock, 'releaseLock');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableStreamBYOBReader.prototype, Symbol.toStringTag, {\n            value: 'ReadableStreamBYOBReader',\n            configurable: true\n        });\n    }\n    // Abstract operations for the readers.\n    function IsReadableStreamBYOBReader(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {\n            return false;\n        }\n        return x instanceof ReadableStreamBYOBReader;\n    }\n    function ReadableStreamBYOBReaderRead(reader, view, min, readIntoRequest) {\n        const stream = reader._ownerReadableStream;\n        stream._disturbed = true;\n        if (stream._state === 'errored') {\n            readIntoRequest._errorSteps(stream._storedError);\n        }\n        else {\n            ReadableByteStreamControllerPullInto(stream._readableStreamController, view, min, readIntoRequest);\n        }\n    }\n    function ReadableStreamBYOBReaderRelease(reader) {\n        ReadableStreamReaderGenericRelease(reader);\n        const e = new TypeError('Reader was released');\n        ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n    }\n    function ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e) {\n        const readIntoRequests = reader._readIntoRequests;\n        reader._readIntoRequests = new SimpleQueue();\n        readIntoRequests.forEach(readIntoRequest => {\n            readIntoRequest._errorSteps(e);\n        });\n    }\n    // Helper functions for the ReadableStreamBYOBReader.\n    function byobReaderBrandCheckException(name) {\n        return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);\n    }\n\n    function ExtractHighWaterMark(strategy, defaultHWM) {\n        const { highWaterMark } = strategy;\n        if (highWaterMark === undefined) {\n            return defaultHWM;\n        }\n        if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {\n            throw new RangeError('Invalid highWaterMark');\n        }\n        return highWaterMark;\n    }\n    function ExtractSizeAlgorithm(strategy) {\n        const { size } = strategy;\n        if (!size) {\n            return () => 1;\n        }\n        return size;\n    }\n\n    function convertQueuingStrategy(init, context) {\n        assertDictionary(init, context);\n        const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;\n        const size = init === null || init === void 0 ? void 0 : init.size;\n        return {\n            highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),\n            size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)\n        };\n    }\n    function convertQueuingStrategySize(fn, context) {\n        assertFunction(fn, context);\n        return chunk => convertUnrestrictedDouble(fn(chunk));\n    }\n\n    function convertUnderlyingSink(original, context) {\n        assertDictionary(original, context);\n        const abort = original === null || original === void 0 ? void 0 : original.abort;\n        const close = original === null || original === void 0 ? void 0 : original.close;\n        const start = original === null || original === void 0 ? void 0 : original.start;\n        const type = original === null || original === void 0 ? void 0 : original.type;\n        const write = original === null || original === void 0 ? void 0 : original.write;\n        return {\n            abort: abort === undefined ?\n                undefined :\n                convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`),\n            close: close === undefined ?\n                undefined :\n                convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`),\n            start: start === undefined ?\n                undefined :\n                convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`),\n            write: write === undefined ?\n                undefined :\n                convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`),\n            type\n        };\n    }\n    function convertUnderlyingSinkAbortCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (reason) => promiseCall(fn, original, [reason]);\n    }\n    function convertUnderlyingSinkCloseCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return () => promiseCall(fn, original, []);\n    }\n    function convertUnderlyingSinkStartCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (controller) => reflectCall(fn, original, [controller]);\n    }\n    function convertUnderlyingSinkWriteCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);\n    }\n\n    function assertWritableStream(x, context) {\n        if (!IsWritableStream(x)) {\n            throw new TypeError(`${context} is not a WritableStream.`);\n        }\n    }\n\n    function isAbortSignal(value) {\n        if (typeof value !== 'object' || value === null) {\n            return false;\n        }\n        try {\n            return typeof value.aborted === 'boolean';\n        }\n        catch (_a) {\n            // AbortSignal.prototype.aborted throws if its brand check fails\n            return false;\n        }\n    }\n    const supportsAbortController = typeof AbortController === 'function';\n    /**\n     * Construct a new AbortController, if supported by the platform.\n     *\n     * @internal\n     */\n    function createAbortController() {\n        if (supportsAbortController) {\n            return new AbortController();\n        }\n        return undefined;\n    }\n\n    /**\n     * A writable stream represents a destination for data, into which you can write.\n     *\n     * @public\n     */\n    class WritableStream {\n        constructor(rawUnderlyingSink = {}, rawStrategy = {}) {\n            if (rawUnderlyingSink === undefined) {\n                rawUnderlyingSink = null;\n            }\n            else {\n                assertObject(rawUnderlyingSink, 'First parameter');\n            }\n            const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n            const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');\n            InitializeWritableStream(this);\n            const type = underlyingSink.type;\n            if (type !== undefined) {\n                throw new RangeError('Invalid type is specified');\n            }\n            const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n            const highWaterMark = ExtractHighWaterMark(strategy, 1);\n            SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);\n        }\n        /**\n         * Returns whether or not the writable stream is locked to a writer.\n         */\n        get locked() {\n            if (!IsWritableStream(this)) {\n                throw streamBrandCheckException$2('locked');\n            }\n            return IsWritableStreamLocked(this);\n        }\n        /**\n         * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be\n         * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort\n         * mechanism of the underlying sink.\n         *\n         * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled\n         * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel\n         * the stream) if the stream is currently locked.\n         */\n        abort(reason = undefined) {\n            if (!IsWritableStream(this)) {\n                return promiseRejectedWith(streamBrandCheckException$2('abort'));\n            }\n            if (IsWritableStreamLocked(this)) {\n                return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));\n            }\n            return WritableStreamAbort(this, reason);\n        }\n        /**\n         * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its\n         * close behavior. During this time any further attempts to write will fail (without erroring the stream).\n         *\n         * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream\n         * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with\n         * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.\n         */\n        close() {\n            if (!IsWritableStream(this)) {\n                return promiseRejectedWith(streamBrandCheckException$2('close'));\n            }\n            if (IsWritableStreamLocked(this)) {\n                return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));\n            }\n            if (WritableStreamCloseQueuedOrInFlight(this)) {\n                return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n            }\n            return WritableStreamClose(this);\n        }\n        /**\n         * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream\n         * is locked, no other writer can be acquired until this one is released.\n         *\n         * This functionality is especially useful for creating abstractions that desire the ability to write to a stream\n         * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at\n         * the same time, which would cause the resulting written data to be unpredictable and probably useless.\n         */\n        getWriter() {\n            if (!IsWritableStream(this)) {\n                throw streamBrandCheckException$2('getWriter');\n            }\n            return AcquireWritableStreamDefaultWriter(this);\n        }\n    }\n    Object.defineProperties(WritableStream.prototype, {\n        abort: { enumerable: true },\n        close: { enumerable: true },\n        getWriter: { enumerable: true },\n        locked: { enumerable: true }\n    });\n    setFunctionName(WritableStream.prototype.abort, 'abort');\n    setFunctionName(WritableStream.prototype.close, 'close');\n    setFunctionName(WritableStream.prototype.getWriter, 'getWriter');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(WritableStream.prototype, Symbol.toStringTag, {\n            value: 'WritableStream',\n            configurable: true\n        });\n    }\n    // Abstract operations for the WritableStream.\n    function AcquireWritableStreamDefaultWriter(stream) {\n        return new WritableStreamDefaultWriter(stream);\n    }\n    // Throws if and only if startAlgorithm throws.\n    function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {\n        const stream = Object.create(WritableStream.prototype);\n        InitializeWritableStream(stream);\n        const controller = Object.create(WritableStreamDefaultController.prototype);\n        SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);\n        return stream;\n    }\n    function InitializeWritableStream(stream) {\n        stream._state = 'writable';\n        // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is\n        // 'erroring' or 'errored'. May be set to an undefined value.\n        stream._storedError = undefined;\n        stream._writer = undefined;\n        // Initialize to undefined first because the constructor of the controller checks this\n        // variable to validate the caller.\n        stream._writableStreamController = undefined;\n        // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data\n        // producer without waiting for the queued writes to finish.\n        stream._writeRequests = new SimpleQueue();\n        // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents\n        // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.\n        stream._inFlightWriteRequest = undefined;\n        // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer\n        // has been detached.\n        stream._closeRequest = undefined;\n        // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it\n        // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.\n        stream._inFlightCloseRequest = undefined;\n        // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.\n        stream._pendingAbortRequest = undefined;\n        // The backpressure signal set by the controller.\n        stream._backpressure = false;\n    }\n    function IsWritableStream(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {\n            return false;\n        }\n        return x instanceof WritableStream;\n    }\n    function IsWritableStreamLocked(stream) {\n        if (stream._writer === undefined) {\n            return false;\n        }\n        return true;\n    }\n    function WritableStreamAbort(stream, reason) {\n        var _a;\n        if (stream._state === 'closed' || stream._state === 'errored') {\n            return promiseResolvedWith(undefined);\n        }\n        stream._writableStreamController._abortReason = reason;\n        (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort(reason);\n        // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',\n        // but it doesn't know that signaling abort runs author code that might have changed the state.\n        // Widen the type again by casting to WritableStreamState.\n        const state = stream._state;\n        if (state === 'closed' || state === 'errored') {\n            return promiseResolvedWith(undefined);\n        }\n        if (stream._pendingAbortRequest !== undefined) {\n            return stream._pendingAbortRequest._promise;\n        }\n        let wasAlreadyErroring = false;\n        if (state === 'erroring') {\n            wasAlreadyErroring = true;\n            // reason will not be used, so don't keep a reference to it.\n            reason = undefined;\n        }\n        const promise = newPromise((resolve, reject) => {\n            stream._pendingAbortRequest = {\n                _promise: undefined,\n                _resolve: resolve,\n                _reject: reject,\n                _reason: reason,\n                _wasAlreadyErroring: wasAlreadyErroring\n            };\n        });\n        stream._pendingAbortRequest._promise = promise;\n        if (!wasAlreadyErroring) {\n            WritableStreamStartErroring(stream, reason);\n        }\n        return promise;\n    }\n    function WritableStreamClose(stream) {\n        const state = stream._state;\n        if (state === 'closed' || state === 'errored') {\n            return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`));\n        }\n        const promise = newPromise((resolve, reject) => {\n            const closeRequest = {\n                _resolve: resolve,\n                _reject: reject\n            };\n            stream._closeRequest = closeRequest;\n        });\n        const writer = stream._writer;\n        if (writer !== undefined && stream._backpressure && state === 'writable') {\n            defaultWriterReadyPromiseResolve(writer);\n        }\n        WritableStreamDefaultControllerClose(stream._writableStreamController);\n        return promise;\n    }\n    // WritableStream API exposed for controllers.\n    function WritableStreamAddWriteRequest(stream) {\n        const promise = newPromise((resolve, reject) => {\n            const writeRequest = {\n                _resolve: resolve,\n                _reject: reject\n            };\n            stream._writeRequests.push(writeRequest);\n        });\n        return promise;\n    }\n    function WritableStreamDealWithRejection(stream, error) {\n        const state = stream._state;\n        if (state === 'writable') {\n            WritableStreamStartErroring(stream, error);\n            return;\n        }\n        WritableStreamFinishErroring(stream);\n    }\n    function WritableStreamStartErroring(stream, reason) {\n        const controller = stream._writableStreamController;\n        stream._state = 'erroring';\n        stream._storedError = reason;\n        const writer = stream._writer;\n        if (writer !== undefined) {\n            WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);\n        }\n        if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {\n            WritableStreamFinishErroring(stream);\n        }\n    }\n    function WritableStreamFinishErroring(stream) {\n        stream._state = 'errored';\n        stream._writableStreamController[ErrorSteps]();\n        const storedError = stream._storedError;\n        stream._writeRequests.forEach(writeRequest => {\n            writeRequest._reject(storedError);\n        });\n        stream._writeRequests = new SimpleQueue();\n        if (stream._pendingAbortRequest === undefined) {\n            WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n            return;\n        }\n        const abortRequest = stream._pendingAbortRequest;\n        stream._pendingAbortRequest = undefined;\n        if (abortRequest._wasAlreadyErroring) {\n            abortRequest._reject(storedError);\n            WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n            return;\n        }\n        const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);\n        uponPromise(promise, () => {\n            abortRequest._resolve();\n            WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n            return null;\n        }, (reason) => {\n            abortRequest._reject(reason);\n            WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);\n            return null;\n        });\n    }\n    function WritableStreamFinishInFlightWrite(stream) {\n        stream._inFlightWriteRequest._resolve(undefined);\n        stream._inFlightWriteRequest = undefined;\n    }\n    function WritableStreamFinishInFlightWriteWithError(stream, error) {\n        stream._inFlightWriteRequest._reject(error);\n        stream._inFlightWriteRequest = undefined;\n        WritableStreamDealWithRejection(stream, error);\n    }\n    function WritableStreamFinishInFlightClose(stream) {\n        stream._inFlightCloseRequest._resolve(undefined);\n        stream._inFlightCloseRequest = undefined;\n        const state = stream._state;\n        if (state === 'erroring') {\n            // The error was too late to do anything, so it is ignored.\n            stream._storedError = undefined;\n            if (stream._pendingAbortRequest !== undefined) {\n                stream._pendingAbortRequest._resolve();\n                stream._pendingAbortRequest = undefined;\n            }\n        }\n        stream._state = 'closed';\n        const writer = stream._writer;\n        if (writer !== undefined) {\n            defaultWriterClosedPromiseResolve(writer);\n        }\n    }\n    function WritableStreamFinishInFlightCloseWithError(stream, error) {\n        stream._inFlightCloseRequest._reject(error);\n        stream._inFlightCloseRequest = undefined;\n        // Never execute sink abort() after sink close().\n        if (stream._pendingAbortRequest !== undefined) {\n            stream._pendingAbortRequest._reject(error);\n            stream._pendingAbortRequest = undefined;\n        }\n        WritableStreamDealWithRejection(stream, error);\n    }\n    // TODO(ricea): Fix alphabetical order.\n    function WritableStreamCloseQueuedOrInFlight(stream) {\n        if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {\n            return false;\n        }\n        return true;\n    }\n    function WritableStreamHasOperationMarkedInFlight(stream) {\n        if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {\n            return false;\n        }\n        return true;\n    }\n    function WritableStreamMarkCloseRequestInFlight(stream) {\n        stream._inFlightCloseRequest = stream._closeRequest;\n        stream._closeRequest = undefined;\n    }\n    function WritableStreamMarkFirstWriteRequestInFlight(stream) {\n        stream._inFlightWriteRequest = stream._writeRequests.shift();\n    }\n    function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {\n        if (stream._closeRequest !== undefined) {\n            stream._closeRequest._reject(stream._storedError);\n            stream._closeRequest = undefined;\n        }\n        const writer = stream._writer;\n        if (writer !== undefined) {\n            defaultWriterClosedPromiseReject(writer, stream._storedError);\n        }\n    }\n    function WritableStreamUpdateBackpressure(stream, backpressure) {\n        const writer = stream._writer;\n        if (writer !== undefined && backpressure !== stream._backpressure) {\n            if (backpressure) {\n                defaultWriterReadyPromiseReset(writer);\n            }\n            else {\n                defaultWriterReadyPromiseResolve(writer);\n            }\n        }\n        stream._backpressure = backpressure;\n    }\n    /**\n     * A default writer vended by a {@link WritableStream}.\n     *\n     * @public\n     */\n    class WritableStreamDefaultWriter {\n        constructor(stream) {\n            assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');\n            assertWritableStream(stream, 'First parameter');\n            if (IsWritableStreamLocked(stream)) {\n                throw new TypeError('This stream has already been locked for exclusive writing by another writer');\n            }\n            this._ownerWritableStream = stream;\n            stream._writer = this;\n            const state = stream._state;\n            if (state === 'writable') {\n                if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {\n                    defaultWriterReadyPromiseInitialize(this);\n                }\n                else {\n                    defaultWriterReadyPromiseInitializeAsResolved(this);\n                }\n                defaultWriterClosedPromiseInitialize(this);\n            }\n            else if (state === 'erroring') {\n                defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);\n                defaultWriterClosedPromiseInitialize(this);\n            }\n            else if (state === 'closed') {\n                defaultWriterReadyPromiseInitializeAsResolved(this);\n                defaultWriterClosedPromiseInitializeAsResolved(this);\n            }\n            else {\n                const storedError = stream._storedError;\n                defaultWriterReadyPromiseInitializeAsRejected(this, storedError);\n                defaultWriterClosedPromiseInitializeAsRejected(this, storedError);\n            }\n        }\n        /**\n         * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or\n         * the writer’s lock is released before the stream finishes closing.\n         */\n        get closed() {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                return promiseRejectedWith(defaultWriterBrandCheckException('closed'));\n            }\n            return this._closedPromise;\n        }\n        /**\n         * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.\n         * A producer can use this information to determine the right amount of data to write.\n         *\n         * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort\n         * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when\n         * the writer’s lock is released.\n         */\n        get desiredSize() {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                throw defaultWriterBrandCheckException('desiredSize');\n            }\n            if (this._ownerWritableStream === undefined) {\n                throw defaultWriterLockException('desiredSize');\n            }\n            return WritableStreamDefaultWriterGetDesiredSize(this);\n        }\n        /**\n         * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions\n         * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips\n         * back to zero or below, the getter will return a new promise that stays pending until the next transition.\n         *\n         * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become\n         * rejected.\n         */\n        get ready() {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                return promiseRejectedWith(defaultWriterBrandCheckException('ready'));\n            }\n            return this._readyPromise;\n        }\n        /**\n         * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.\n         */\n        abort(reason = undefined) {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                return promiseRejectedWith(defaultWriterBrandCheckException('abort'));\n            }\n            if (this._ownerWritableStream === undefined) {\n                return promiseRejectedWith(defaultWriterLockException('abort'));\n            }\n            return WritableStreamDefaultWriterAbort(this, reason);\n        }\n        /**\n         * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.\n         */\n        close() {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                return promiseRejectedWith(defaultWriterBrandCheckException('close'));\n            }\n            const stream = this._ownerWritableStream;\n            if (stream === undefined) {\n                return promiseRejectedWith(defaultWriterLockException('close'));\n            }\n            if (WritableStreamCloseQueuedOrInFlight(stream)) {\n                return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));\n            }\n            return WritableStreamDefaultWriterClose(this);\n        }\n        /**\n         * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.\n         * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from\n         * now on; otherwise, the writer will appear closed.\n         *\n         * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the\n         * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).\n         * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents\n         * other producers from writing in an interleaved manner.\n         */\n        releaseLock() {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                throw defaultWriterBrandCheckException('releaseLock');\n            }\n            const stream = this._ownerWritableStream;\n            if (stream === undefined) {\n                return;\n            }\n            WritableStreamDefaultWriterRelease(this);\n        }\n        write(chunk = undefined) {\n            if (!IsWritableStreamDefaultWriter(this)) {\n                return promiseRejectedWith(defaultWriterBrandCheckException('write'));\n            }\n            if (this._ownerWritableStream === undefined) {\n                return promiseRejectedWith(defaultWriterLockException('write to'));\n            }\n            return WritableStreamDefaultWriterWrite(this, chunk);\n        }\n    }\n    Object.defineProperties(WritableStreamDefaultWriter.prototype, {\n        abort: { enumerable: true },\n        close: { enumerable: true },\n        releaseLock: { enumerable: true },\n        write: { enumerable: true },\n        closed: { enumerable: true },\n        desiredSize: { enumerable: true },\n        ready: { enumerable: true }\n    });\n    setFunctionName(WritableStreamDefaultWriter.prototype.abort, 'abort');\n    setFunctionName(WritableStreamDefaultWriter.prototype.close, 'close');\n    setFunctionName(WritableStreamDefaultWriter.prototype.releaseLock, 'releaseLock');\n    setFunctionName(WritableStreamDefaultWriter.prototype.write, 'write');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(WritableStreamDefaultWriter.prototype, Symbol.toStringTag, {\n            value: 'WritableStreamDefaultWriter',\n            configurable: true\n        });\n    }\n    // Abstract operations for the WritableStreamDefaultWriter.\n    function IsWritableStreamDefaultWriter(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {\n            return false;\n        }\n        return x instanceof WritableStreamDefaultWriter;\n    }\n    // A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.\n    function WritableStreamDefaultWriterAbort(writer, reason) {\n        const stream = writer._ownerWritableStream;\n        return WritableStreamAbort(stream, reason);\n    }\n    function WritableStreamDefaultWriterClose(writer) {\n        const stream = writer._ownerWritableStream;\n        return WritableStreamClose(stream);\n    }\n    function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) {\n        const stream = writer._ownerWritableStream;\n        const state = stream._state;\n        if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n            return promiseResolvedWith(undefined);\n        }\n        if (state === 'errored') {\n            return promiseRejectedWith(stream._storedError);\n        }\n        return WritableStreamDefaultWriterClose(writer);\n    }\n    function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {\n        if (writer._closedPromiseState === 'pending') {\n            defaultWriterClosedPromiseReject(writer, error);\n        }\n        else {\n            defaultWriterClosedPromiseResetToRejected(writer, error);\n        }\n    }\n    function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {\n        if (writer._readyPromiseState === 'pending') {\n            defaultWriterReadyPromiseReject(writer, error);\n        }\n        else {\n            defaultWriterReadyPromiseResetToRejected(writer, error);\n        }\n    }\n    function WritableStreamDefaultWriterGetDesiredSize(writer) {\n        const stream = writer._ownerWritableStream;\n        const state = stream._state;\n        if (state === 'errored' || state === 'erroring') {\n            return null;\n        }\n        if (state === 'closed') {\n            return 0;\n        }\n        return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);\n    }\n    function WritableStreamDefaultWriterRelease(writer) {\n        const stream = writer._ownerWritableStream;\n        const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`);\n        WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);\n        // The state transitions to \"errored\" before the sink abort() method runs, but the writer.closed promise is not\n        // rejected until afterwards. This means that simply testing state will not work.\n        WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);\n        stream._writer = undefined;\n        writer._ownerWritableStream = undefined;\n    }\n    function WritableStreamDefaultWriterWrite(writer, chunk) {\n        const stream = writer._ownerWritableStream;\n        const controller = stream._writableStreamController;\n        const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);\n        if (stream !== writer._ownerWritableStream) {\n            return promiseRejectedWith(defaultWriterLockException('write to'));\n        }\n        const state = stream._state;\n        if (state === 'errored') {\n            return promiseRejectedWith(stream._storedError);\n        }\n        if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {\n            return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));\n        }\n        if (state === 'erroring') {\n            return promiseRejectedWith(stream._storedError);\n        }\n        const promise = WritableStreamAddWriteRequest(stream);\n        WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);\n        return promise;\n    }\n    const closeSentinel = {};\n    /**\n     * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.\n     *\n     * @public\n     */\n    class WritableStreamDefaultController {\n        constructor() {\n            throw new TypeError('Illegal constructor');\n        }\n        /**\n         * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.\n         *\n         * @deprecated\n         *  This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.\n         *  Use {@link WritableStreamDefaultController.signal}'s `reason` instead.\n         */\n        get abortReason() {\n            if (!IsWritableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$2('abortReason');\n            }\n            return this._abortReason;\n        }\n        /**\n         * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.\n         */\n        get signal() {\n            if (!IsWritableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$2('signal');\n            }\n            if (this._abortController === undefined) {\n                // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.\n                // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,\n                // so instead we only implement support for `signal` if we find a global `AbortController` constructor.\n                throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');\n            }\n            return this._abortController.signal;\n        }\n        /**\n         * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.\n         *\n         * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying\n         * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the\n         * normal lifecycle of interactions with the underlying sink.\n         */\n        error(e = undefined) {\n            if (!IsWritableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$2('error');\n            }\n            const state = this._controlledWritableStream._state;\n            if (state !== 'writable') {\n                // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so\n                // just treat it as a no-op.\n                return;\n            }\n            WritableStreamDefaultControllerError(this, e);\n        }\n        /** @internal */\n        [AbortSteps](reason) {\n            const result = this._abortAlgorithm(reason);\n            WritableStreamDefaultControllerClearAlgorithms(this);\n            return result;\n        }\n        /** @internal */\n        [ErrorSteps]() {\n            ResetQueue(this);\n        }\n    }\n    Object.defineProperties(WritableStreamDefaultController.prototype, {\n        abortReason: { enumerable: true },\n        signal: { enumerable: true },\n        error: { enumerable: true }\n    });\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(WritableStreamDefaultController.prototype, Symbol.toStringTag, {\n            value: 'WritableStreamDefaultController',\n            configurable: true\n        });\n    }\n    // Abstract operations implementing interface required by the WritableStream.\n    function IsWritableStreamDefaultController(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {\n            return false;\n        }\n        return x instanceof WritableStreamDefaultController;\n    }\n    function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) {\n        controller._controlledWritableStream = stream;\n        stream._writableStreamController = controller;\n        // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.\n        controller._queue = undefined;\n        controller._queueTotalSize = undefined;\n        ResetQueue(controller);\n        controller._abortReason = undefined;\n        controller._abortController = createAbortController();\n        controller._started = false;\n        controller._strategySizeAlgorithm = sizeAlgorithm;\n        controller._strategyHWM = highWaterMark;\n        controller._writeAlgorithm = writeAlgorithm;\n        controller._closeAlgorithm = closeAlgorithm;\n        controller._abortAlgorithm = abortAlgorithm;\n        const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n        WritableStreamUpdateBackpressure(stream, backpressure);\n        const startResult = startAlgorithm();\n        const startPromise = promiseResolvedWith(startResult);\n        uponPromise(startPromise, () => {\n            controller._started = true;\n            WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n            return null;\n        }, r => {\n            controller._started = true;\n            WritableStreamDealWithRejection(stream, r);\n            return null;\n        });\n    }\n    function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) {\n        const controller = Object.create(WritableStreamDefaultController.prototype);\n        let startAlgorithm;\n        let writeAlgorithm;\n        let closeAlgorithm;\n        let abortAlgorithm;\n        if (underlyingSink.start !== undefined) {\n            startAlgorithm = () => underlyingSink.start(controller);\n        }\n        else {\n            startAlgorithm = () => undefined;\n        }\n        if (underlyingSink.write !== undefined) {\n            writeAlgorithm = chunk => underlyingSink.write(chunk, controller);\n        }\n        else {\n            writeAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        if (underlyingSink.close !== undefined) {\n            closeAlgorithm = () => underlyingSink.close();\n        }\n        else {\n            closeAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        if (underlyingSink.abort !== undefined) {\n            abortAlgorithm = reason => underlyingSink.abort(reason);\n        }\n        else {\n            abortAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);\n    }\n    // ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.\n    function WritableStreamDefaultControllerClearAlgorithms(controller) {\n        controller._writeAlgorithm = undefined;\n        controller._closeAlgorithm = undefined;\n        controller._abortAlgorithm = undefined;\n        controller._strategySizeAlgorithm = undefined;\n    }\n    function WritableStreamDefaultControllerClose(controller) {\n        EnqueueValueWithSize(controller, closeSentinel, 0);\n        WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n    }\n    function WritableStreamDefaultControllerGetChunkSize(controller, chunk) {\n        try {\n            return controller._strategySizeAlgorithm(chunk);\n        }\n        catch (chunkSizeE) {\n            WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);\n            return 1;\n        }\n    }\n    function WritableStreamDefaultControllerGetDesiredSize(controller) {\n        return controller._strategyHWM - controller._queueTotalSize;\n    }\n    function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) {\n        try {\n            EnqueueValueWithSize(controller, chunk, chunkSize);\n        }\n        catch (enqueueE) {\n            WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);\n            return;\n        }\n        const stream = controller._controlledWritableStream;\n        if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {\n            const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n            WritableStreamUpdateBackpressure(stream, backpressure);\n        }\n        WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n    }\n    // Abstract operations for the WritableStreamDefaultController.\n    function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {\n        const stream = controller._controlledWritableStream;\n        if (!controller._started) {\n            return;\n        }\n        if (stream._inFlightWriteRequest !== undefined) {\n            return;\n        }\n        const state = stream._state;\n        if (state === 'erroring') {\n            WritableStreamFinishErroring(stream);\n            return;\n        }\n        if (controller._queue.length === 0) {\n            return;\n        }\n        const value = PeekQueueValue(controller);\n        if (value === closeSentinel) {\n            WritableStreamDefaultControllerProcessClose(controller);\n        }\n        else {\n            WritableStreamDefaultControllerProcessWrite(controller, value);\n        }\n    }\n    function WritableStreamDefaultControllerErrorIfNeeded(controller, error) {\n        if (controller._controlledWritableStream._state === 'writable') {\n            WritableStreamDefaultControllerError(controller, error);\n        }\n    }\n    function WritableStreamDefaultControllerProcessClose(controller) {\n        const stream = controller._controlledWritableStream;\n        WritableStreamMarkCloseRequestInFlight(stream);\n        DequeueValue(controller);\n        const sinkClosePromise = controller._closeAlgorithm();\n        WritableStreamDefaultControllerClearAlgorithms(controller);\n        uponPromise(sinkClosePromise, () => {\n            WritableStreamFinishInFlightClose(stream);\n            return null;\n        }, reason => {\n            WritableStreamFinishInFlightCloseWithError(stream, reason);\n            return null;\n        });\n    }\n    function WritableStreamDefaultControllerProcessWrite(controller, chunk) {\n        const stream = controller._controlledWritableStream;\n        WritableStreamMarkFirstWriteRequestInFlight(stream);\n        const sinkWritePromise = controller._writeAlgorithm(chunk);\n        uponPromise(sinkWritePromise, () => {\n            WritableStreamFinishInFlightWrite(stream);\n            const state = stream._state;\n            DequeueValue(controller);\n            if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {\n                const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);\n                WritableStreamUpdateBackpressure(stream, backpressure);\n            }\n            WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);\n            return null;\n        }, reason => {\n            if (stream._state === 'writable') {\n                WritableStreamDefaultControllerClearAlgorithms(controller);\n            }\n            WritableStreamFinishInFlightWriteWithError(stream, reason);\n            return null;\n        });\n    }\n    function WritableStreamDefaultControllerGetBackpressure(controller) {\n        const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);\n        return desiredSize <= 0;\n    }\n    // A client of WritableStreamDefaultController may use these functions directly to bypass state check.\n    function WritableStreamDefaultControllerError(controller, error) {\n        const stream = controller._controlledWritableStream;\n        WritableStreamDefaultControllerClearAlgorithms(controller);\n        WritableStreamStartErroring(stream, error);\n    }\n    // Helper functions for the WritableStream.\n    function streamBrandCheckException$2(name) {\n        return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);\n    }\n    // Helper functions for the WritableStreamDefaultController.\n    function defaultControllerBrandCheckException$2(name) {\n        return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);\n    }\n    // Helper functions for the WritableStreamDefaultWriter.\n    function defaultWriterBrandCheckException(name) {\n        return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);\n    }\n    function defaultWriterLockException(name) {\n        return new TypeError('Cannot ' + name + ' a stream using a released writer');\n    }\n    function defaultWriterClosedPromiseInitialize(writer) {\n        writer._closedPromise = newPromise((resolve, reject) => {\n            writer._closedPromise_resolve = resolve;\n            writer._closedPromise_reject = reject;\n            writer._closedPromiseState = 'pending';\n        });\n    }\n    function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) {\n        defaultWriterClosedPromiseInitialize(writer);\n        defaultWriterClosedPromiseReject(writer, reason);\n    }\n    function defaultWriterClosedPromiseInitializeAsResolved(writer) {\n        defaultWriterClosedPromiseInitialize(writer);\n        defaultWriterClosedPromiseResolve(writer);\n    }\n    function defaultWriterClosedPromiseReject(writer, reason) {\n        if (writer._closedPromise_reject === undefined) {\n            return;\n        }\n        setPromiseIsHandledToTrue(writer._closedPromise);\n        writer._closedPromise_reject(reason);\n        writer._closedPromise_resolve = undefined;\n        writer._closedPromise_reject = undefined;\n        writer._closedPromiseState = 'rejected';\n    }\n    function defaultWriterClosedPromiseResetToRejected(writer, reason) {\n        defaultWriterClosedPromiseInitializeAsRejected(writer, reason);\n    }\n    function defaultWriterClosedPromiseResolve(writer) {\n        if (writer._closedPromise_resolve === undefined) {\n            return;\n        }\n        writer._closedPromise_resolve(undefined);\n        writer._closedPromise_resolve = undefined;\n        writer._closedPromise_reject = undefined;\n        writer._closedPromiseState = 'resolved';\n    }\n    function defaultWriterReadyPromiseInitialize(writer) {\n        writer._readyPromise = newPromise((resolve, reject) => {\n            writer._readyPromise_resolve = resolve;\n            writer._readyPromise_reject = reject;\n        });\n        writer._readyPromiseState = 'pending';\n    }\n    function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) {\n        defaultWriterReadyPromiseInitialize(writer);\n        defaultWriterReadyPromiseReject(writer, reason);\n    }\n    function defaultWriterReadyPromiseInitializeAsResolved(writer) {\n        defaultWriterReadyPromiseInitialize(writer);\n        defaultWriterReadyPromiseResolve(writer);\n    }\n    function defaultWriterReadyPromiseReject(writer, reason) {\n        if (writer._readyPromise_reject === undefined) {\n            return;\n        }\n        setPromiseIsHandledToTrue(writer._readyPromise);\n        writer._readyPromise_reject(reason);\n        writer._readyPromise_resolve = undefined;\n        writer._readyPromise_reject = undefined;\n        writer._readyPromiseState = 'rejected';\n    }\n    function defaultWriterReadyPromiseReset(writer) {\n        defaultWriterReadyPromiseInitialize(writer);\n    }\n    function defaultWriterReadyPromiseResetToRejected(writer, reason) {\n        defaultWriterReadyPromiseInitializeAsRejected(writer, reason);\n    }\n    function defaultWriterReadyPromiseResolve(writer) {\n        if (writer._readyPromise_resolve === undefined) {\n            return;\n        }\n        writer._readyPromise_resolve(undefined);\n        writer._readyPromise_resolve = undefined;\n        writer._readyPromise_reject = undefined;\n        writer._readyPromiseState = 'fulfilled';\n    }\n\n    /// <reference lib=\"dom\" />\n    function getGlobals() {\n        if (typeof globalThis !== 'undefined') {\n            return globalThis;\n        }\n        else if (typeof self !== 'undefined') {\n            return self;\n        }\n        else if (typeof global !== 'undefined') {\n            return global;\n        }\n        return undefined;\n    }\n    const globals = getGlobals();\n\n    /// <reference types=\"node\" />\n    function isDOMExceptionConstructor(ctor) {\n        if (!(typeof ctor === 'function' || typeof ctor === 'object')) {\n            return false;\n        }\n        if (ctor.name !== 'DOMException') {\n            return false;\n        }\n        try {\n            new ctor();\n            return true;\n        }\n        catch (_a) {\n            return false;\n        }\n    }\n    /**\n     * Support:\n     * - Web browsers\n     * - Node 18 and higher (https://github.com/nodejs/node/commit/e4b1fb5e6422c1ff151234bb9de792d45dd88d87)\n     */\n    function getFromGlobal() {\n        const ctor = globals === null || globals === void 0 ? void 0 : globals.DOMException;\n        return isDOMExceptionConstructor(ctor) ? ctor : undefined;\n    }\n    /**\n     * Support:\n     * - All platforms\n     */\n    function createPolyfill() {\n        // eslint-disable-next-line @typescript-eslint/no-shadow\n        const ctor = function DOMException(message, name) {\n            this.message = message || '';\n            this.name = name || 'Error';\n            if (Error.captureStackTrace) {\n                Error.captureStackTrace(this, this.constructor);\n            }\n        };\n        setFunctionName(ctor, 'DOMException');\n        ctor.prototype = Object.create(Error.prototype);\n        Object.defineProperty(ctor.prototype, 'constructor', { value: ctor, writable: true, configurable: true });\n        return ctor;\n    }\n    // eslint-disable-next-line @typescript-eslint/no-redeclare\n    const DOMException = getFromGlobal() || createPolyfill();\n\n    function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) {\n        const reader = AcquireReadableStreamDefaultReader(source);\n        const writer = AcquireWritableStreamDefaultWriter(dest);\n        source._disturbed = true;\n        let shuttingDown = false;\n        // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.\n        let currentWrite = promiseResolvedWith(undefined);\n        return newPromise((resolve, reject) => {\n            let abortAlgorithm;\n            if (signal !== undefined) {\n                abortAlgorithm = () => {\n                    const error = signal.reason !== undefined ? signal.reason : new DOMException('Aborted', 'AbortError');\n                    const actions = [];\n                    if (!preventAbort) {\n                        actions.push(() => {\n                            if (dest._state === 'writable') {\n                                return WritableStreamAbort(dest, error);\n                            }\n                            return promiseResolvedWith(undefined);\n                        });\n                    }\n                    if (!preventCancel) {\n                        actions.push(() => {\n                            if (source._state === 'readable') {\n                                return ReadableStreamCancel(source, error);\n                            }\n                            return promiseResolvedWith(undefined);\n                        });\n                    }\n                    shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);\n                };\n                if (signal.aborted) {\n                    abortAlgorithm();\n                    return;\n                }\n                signal.addEventListener('abort', abortAlgorithm);\n            }\n            // Using reader and writer, read all chunks from this and write them to dest\n            // - Backpressure must be enforced\n            // - Shutdown must stop all activity\n            function pipeLoop() {\n                return newPromise((resolveLoop, rejectLoop) => {\n                    function next(done) {\n                        if (done) {\n                            resolveLoop();\n                        }\n                        else {\n                            // Use `PerformPromiseThen` instead of `uponPromise` to avoid\n                            // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers\n                            PerformPromiseThen(pipeStep(), next, rejectLoop);\n                        }\n                    }\n                    next(false);\n                });\n            }\n            function pipeStep() {\n                if (shuttingDown) {\n                    return promiseResolvedWith(true);\n                }\n                return PerformPromiseThen(writer._readyPromise, () => {\n                    return newPromise((resolveRead, rejectRead) => {\n                        ReadableStreamDefaultReaderRead(reader, {\n                            _chunkSteps: chunk => {\n                                currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop);\n                                resolveRead(false);\n                            },\n                            _closeSteps: () => resolveRead(true),\n                            _errorSteps: rejectRead\n                        });\n                    });\n                });\n            }\n            // Errors must be propagated forward\n            isOrBecomesErrored(source, reader._closedPromise, storedError => {\n                if (!preventAbort) {\n                    shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);\n                }\n                else {\n                    shutdown(true, storedError);\n                }\n                return null;\n            });\n            // Errors must be propagated backward\n            isOrBecomesErrored(dest, writer._closedPromise, storedError => {\n                if (!preventCancel) {\n                    shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);\n                }\n                else {\n                    shutdown(true, storedError);\n                }\n                return null;\n            });\n            // Closing must be propagated forward\n            isOrBecomesClosed(source, reader._closedPromise, () => {\n                if (!preventClose) {\n                    shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));\n                }\n                else {\n                    shutdown();\n                }\n                return null;\n            });\n            // Closing must be propagated backward\n            if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {\n                const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');\n                if (!preventCancel) {\n                    shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);\n                }\n                else {\n                    shutdown(true, destClosed);\n                }\n            }\n            setPromiseIsHandledToTrue(pipeLoop());\n            function waitForWritesToFinish() {\n                // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait\n                // for that too.\n                const oldCurrentWrite = currentWrite;\n                return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined);\n            }\n            function isOrBecomesErrored(stream, promise, action) {\n                if (stream._state === 'errored') {\n                    action(stream._storedError);\n                }\n                else {\n                    uponRejection(promise, action);\n                }\n            }\n            function isOrBecomesClosed(stream, promise, action) {\n                if (stream._state === 'closed') {\n                    action();\n                }\n                else {\n                    uponFulfillment(promise, action);\n                }\n            }\n            function shutdownWithAction(action, originalIsError, originalError) {\n                if (shuttingDown) {\n                    return;\n                }\n                shuttingDown = true;\n                if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n                    uponFulfillment(waitForWritesToFinish(), doTheRest);\n                }\n                else {\n                    doTheRest();\n                }\n                function doTheRest() {\n                    uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError));\n                    return null;\n                }\n            }\n            function shutdown(isError, error) {\n                if (shuttingDown) {\n                    return;\n                }\n                shuttingDown = true;\n                if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {\n                    uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));\n                }\n                else {\n                    finalize(isError, error);\n                }\n            }\n            function finalize(isError, error) {\n                WritableStreamDefaultWriterRelease(writer);\n                ReadableStreamReaderGenericRelease(reader);\n                if (signal !== undefined) {\n                    signal.removeEventListener('abort', abortAlgorithm);\n                }\n                if (isError) {\n                    reject(error);\n                }\n                else {\n                    resolve(undefined);\n                }\n                return null;\n            }\n        });\n    }\n\n    /**\n     * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.\n     *\n     * @public\n     */\n    class ReadableStreamDefaultController {\n        constructor() {\n            throw new TypeError('Illegal constructor');\n        }\n        /**\n         * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is\n         * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.\n         */\n        get desiredSize() {\n            if (!IsReadableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$1('desiredSize');\n            }\n            return ReadableStreamDefaultControllerGetDesiredSize(this);\n        }\n        /**\n         * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from\n         * the stream, but once those are read, the stream will become closed.\n         */\n        close() {\n            if (!IsReadableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$1('close');\n            }\n            if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n                throw new TypeError('The stream is not in a state that permits close');\n            }\n            ReadableStreamDefaultControllerClose(this);\n        }\n        enqueue(chunk = undefined) {\n            if (!IsReadableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$1('enqueue');\n            }\n            if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {\n                throw new TypeError('The stream is not in a state that permits enqueue');\n            }\n            return ReadableStreamDefaultControllerEnqueue(this, chunk);\n        }\n        /**\n         * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.\n         */\n        error(e = undefined) {\n            if (!IsReadableStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException$1('error');\n            }\n            ReadableStreamDefaultControllerError(this, e);\n        }\n        /** @internal */\n        [CancelSteps](reason) {\n            ResetQueue(this);\n            const result = this._cancelAlgorithm(reason);\n            ReadableStreamDefaultControllerClearAlgorithms(this);\n            return result;\n        }\n        /** @internal */\n        [PullSteps](readRequest) {\n            const stream = this._controlledReadableStream;\n            if (this._queue.length > 0) {\n                const chunk = DequeueValue(this);\n                if (this._closeRequested && this._queue.length === 0) {\n                    ReadableStreamDefaultControllerClearAlgorithms(this);\n                    ReadableStreamClose(stream);\n                }\n                else {\n                    ReadableStreamDefaultControllerCallPullIfNeeded(this);\n                }\n                readRequest._chunkSteps(chunk);\n            }\n            else {\n                ReadableStreamAddReadRequest(stream, readRequest);\n                ReadableStreamDefaultControllerCallPullIfNeeded(this);\n            }\n        }\n        /** @internal */\n        [ReleaseSteps]() {\n            // Do nothing.\n        }\n    }\n    Object.defineProperties(ReadableStreamDefaultController.prototype, {\n        close: { enumerable: true },\n        enqueue: { enumerable: true },\n        error: { enumerable: true },\n        desiredSize: { enumerable: true }\n    });\n    setFunctionName(ReadableStreamDefaultController.prototype.close, 'close');\n    setFunctionName(ReadableStreamDefaultController.prototype.enqueue, 'enqueue');\n    setFunctionName(ReadableStreamDefaultController.prototype.error, 'error');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableStreamDefaultController.prototype, Symbol.toStringTag, {\n            value: 'ReadableStreamDefaultController',\n            configurable: true\n        });\n    }\n    // Abstract operations for the ReadableStreamDefaultController.\n    function IsReadableStreamDefaultController(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {\n            return false;\n        }\n        return x instanceof ReadableStreamDefaultController;\n    }\n    function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {\n        const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);\n        if (!shouldPull) {\n            return;\n        }\n        if (controller._pulling) {\n            controller._pullAgain = true;\n            return;\n        }\n        controller._pulling = true;\n        const pullPromise = controller._pullAlgorithm();\n        uponPromise(pullPromise, () => {\n            controller._pulling = false;\n            if (controller._pullAgain) {\n                controller._pullAgain = false;\n                ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n            }\n            return null;\n        }, e => {\n            ReadableStreamDefaultControllerError(controller, e);\n            return null;\n        });\n    }\n    function ReadableStreamDefaultControllerShouldCallPull(controller) {\n        const stream = controller._controlledReadableStream;\n        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n            return false;\n        }\n        if (!controller._started) {\n            return false;\n        }\n        if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n            return true;\n        }\n        const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);\n        if (desiredSize > 0) {\n            return true;\n        }\n        return false;\n    }\n    function ReadableStreamDefaultControllerClearAlgorithms(controller) {\n        controller._pullAlgorithm = undefined;\n        controller._cancelAlgorithm = undefined;\n        controller._strategySizeAlgorithm = undefined;\n    }\n    // A client of ReadableStreamDefaultController may use these functions directly to bypass state check.\n    function ReadableStreamDefaultControllerClose(controller) {\n        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n            return;\n        }\n        const stream = controller._controlledReadableStream;\n        controller._closeRequested = true;\n        if (controller._queue.length === 0) {\n            ReadableStreamDefaultControllerClearAlgorithms(controller);\n            ReadableStreamClose(stream);\n        }\n    }\n    function ReadableStreamDefaultControllerEnqueue(controller, chunk) {\n        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {\n            return;\n        }\n        const stream = controller._controlledReadableStream;\n        if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {\n            ReadableStreamFulfillReadRequest(stream, chunk, false);\n        }\n        else {\n            let chunkSize;\n            try {\n                chunkSize = controller._strategySizeAlgorithm(chunk);\n            }\n            catch (chunkSizeE) {\n                ReadableStreamDefaultControllerError(controller, chunkSizeE);\n                throw chunkSizeE;\n            }\n            try {\n                EnqueueValueWithSize(controller, chunk, chunkSize);\n            }\n            catch (enqueueE) {\n                ReadableStreamDefaultControllerError(controller, enqueueE);\n                throw enqueueE;\n            }\n        }\n        ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n    }\n    function ReadableStreamDefaultControllerError(controller, e) {\n        const stream = controller._controlledReadableStream;\n        if (stream._state !== 'readable') {\n            return;\n        }\n        ResetQueue(controller);\n        ReadableStreamDefaultControllerClearAlgorithms(controller);\n        ReadableStreamError(stream, e);\n    }\n    function ReadableStreamDefaultControllerGetDesiredSize(controller) {\n        const state = controller._controlledReadableStream._state;\n        if (state === 'errored') {\n            return null;\n        }\n        if (state === 'closed') {\n            return 0;\n        }\n        return controller._strategyHWM - controller._queueTotalSize;\n    }\n    // This is used in the implementation of TransformStream.\n    function ReadableStreamDefaultControllerHasBackpressure(controller) {\n        if (ReadableStreamDefaultControllerShouldCallPull(controller)) {\n            return false;\n        }\n        return true;\n    }\n    function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) {\n        const state = controller._controlledReadableStream._state;\n        if (!controller._closeRequested && state === 'readable') {\n            return true;\n        }\n        return false;\n    }\n    function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) {\n        controller._controlledReadableStream = stream;\n        controller._queue = undefined;\n        controller._queueTotalSize = undefined;\n        ResetQueue(controller);\n        controller._started = false;\n        controller._closeRequested = false;\n        controller._pullAgain = false;\n        controller._pulling = false;\n        controller._strategySizeAlgorithm = sizeAlgorithm;\n        controller._strategyHWM = highWaterMark;\n        controller._pullAlgorithm = pullAlgorithm;\n        controller._cancelAlgorithm = cancelAlgorithm;\n        stream._readableStreamController = controller;\n        const startResult = startAlgorithm();\n        uponPromise(promiseResolvedWith(startResult), () => {\n            controller._started = true;\n            ReadableStreamDefaultControllerCallPullIfNeeded(controller);\n            return null;\n        }, r => {\n            ReadableStreamDefaultControllerError(controller, r);\n            return null;\n        });\n    }\n    function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) {\n        const controller = Object.create(ReadableStreamDefaultController.prototype);\n        let startAlgorithm;\n        let pullAlgorithm;\n        let cancelAlgorithm;\n        if (underlyingSource.start !== undefined) {\n            startAlgorithm = () => underlyingSource.start(controller);\n        }\n        else {\n            startAlgorithm = () => undefined;\n        }\n        if (underlyingSource.pull !== undefined) {\n            pullAlgorithm = () => underlyingSource.pull(controller);\n        }\n        else {\n            pullAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        if (underlyingSource.cancel !== undefined) {\n            cancelAlgorithm = reason => underlyingSource.cancel(reason);\n        }\n        else {\n            cancelAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);\n    }\n    // Helper functions for the ReadableStreamDefaultController.\n    function defaultControllerBrandCheckException$1(name) {\n        return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);\n    }\n\n    function ReadableStreamTee(stream, cloneForBranch2) {\n        if (IsReadableByteStreamController(stream._readableStreamController)) {\n            return ReadableByteStreamTee(stream);\n        }\n        return ReadableStreamDefaultTee(stream);\n    }\n    function ReadableStreamDefaultTee(stream, cloneForBranch2) {\n        const reader = AcquireReadableStreamDefaultReader(stream);\n        let reading = false;\n        let readAgain = false;\n        let canceled1 = false;\n        let canceled2 = false;\n        let reason1;\n        let reason2;\n        let branch1;\n        let branch2;\n        let resolveCancelPromise;\n        const cancelPromise = newPromise(resolve => {\n            resolveCancelPromise = resolve;\n        });\n        function pullAlgorithm() {\n            if (reading) {\n                readAgain = true;\n                return promiseResolvedWith(undefined);\n            }\n            reading = true;\n            const readRequest = {\n                _chunkSteps: chunk => {\n                    // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n                    // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n                    // successful synchronously-available reads get ahead of asynchronously-available errors.\n                    _queueMicrotask(() => {\n                        readAgain = false;\n                        const chunk1 = chunk;\n                        const chunk2 = chunk;\n                        // There is no way to access the cloning code right now in the reference implementation.\n                        // If we add one then we'll need an implementation for serializable objects.\n                        // if (!canceled2 && cloneForBranch2) {\n                        //   chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));\n                        // }\n                        if (!canceled1) {\n                            ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);\n                        }\n                        if (!canceled2) {\n                            ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);\n                        }\n                        reading = false;\n                        if (readAgain) {\n                            pullAlgorithm();\n                        }\n                    });\n                },\n                _closeSteps: () => {\n                    reading = false;\n                    if (!canceled1) {\n                        ReadableStreamDefaultControllerClose(branch1._readableStreamController);\n                    }\n                    if (!canceled2) {\n                        ReadableStreamDefaultControllerClose(branch2._readableStreamController);\n                    }\n                    if (!canceled1 || !canceled2) {\n                        resolveCancelPromise(undefined);\n                    }\n                },\n                _errorSteps: () => {\n                    reading = false;\n                }\n            };\n            ReadableStreamDefaultReaderRead(reader, readRequest);\n            return promiseResolvedWith(undefined);\n        }\n        function cancel1Algorithm(reason) {\n            canceled1 = true;\n            reason1 = reason;\n            if (canceled2) {\n                const compositeReason = CreateArrayFromList([reason1, reason2]);\n                const cancelResult = ReadableStreamCancel(stream, compositeReason);\n                resolveCancelPromise(cancelResult);\n            }\n            return cancelPromise;\n        }\n        function cancel2Algorithm(reason) {\n            canceled2 = true;\n            reason2 = reason;\n            if (canceled1) {\n                const compositeReason = CreateArrayFromList([reason1, reason2]);\n                const cancelResult = ReadableStreamCancel(stream, compositeReason);\n                resolveCancelPromise(cancelResult);\n            }\n            return cancelPromise;\n        }\n        function startAlgorithm() {\n            // do nothing\n        }\n        branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);\n        branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);\n        uponRejection(reader._closedPromise, (r) => {\n            ReadableStreamDefaultControllerError(branch1._readableStreamController, r);\n            ReadableStreamDefaultControllerError(branch2._readableStreamController, r);\n            if (!canceled1 || !canceled2) {\n                resolveCancelPromise(undefined);\n            }\n            return null;\n        });\n        return [branch1, branch2];\n    }\n    function ReadableByteStreamTee(stream) {\n        let reader = AcquireReadableStreamDefaultReader(stream);\n        let reading = false;\n        let readAgainForBranch1 = false;\n        let readAgainForBranch2 = false;\n        let canceled1 = false;\n        let canceled2 = false;\n        let reason1;\n        let reason2;\n        let branch1;\n        let branch2;\n        let resolveCancelPromise;\n        const cancelPromise = newPromise(resolve => {\n            resolveCancelPromise = resolve;\n        });\n        function forwardReaderError(thisReader) {\n            uponRejection(thisReader._closedPromise, r => {\n                if (thisReader !== reader) {\n                    return null;\n                }\n                ReadableByteStreamControllerError(branch1._readableStreamController, r);\n                ReadableByteStreamControllerError(branch2._readableStreamController, r);\n                if (!canceled1 || !canceled2) {\n                    resolveCancelPromise(undefined);\n                }\n                return null;\n            });\n        }\n        function pullWithDefaultReader() {\n            if (IsReadableStreamBYOBReader(reader)) {\n                ReadableStreamReaderGenericRelease(reader);\n                reader = AcquireReadableStreamDefaultReader(stream);\n                forwardReaderError(reader);\n            }\n            const readRequest = {\n                _chunkSteps: chunk => {\n                    // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n                    // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n                    // successful synchronously-available reads get ahead of asynchronously-available errors.\n                    _queueMicrotask(() => {\n                        readAgainForBranch1 = false;\n                        readAgainForBranch2 = false;\n                        const chunk1 = chunk;\n                        let chunk2 = chunk;\n                        if (!canceled1 && !canceled2) {\n                            try {\n                                chunk2 = CloneAsUint8Array(chunk);\n                            }\n                            catch (cloneE) {\n                                ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);\n                                ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);\n                                resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n                                return;\n                            }\n                        }\n                        if (!canceled1) {\n                            ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);\n                        }\n                        if (!canceled2) {\n                            ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);\n                        }\n                        reading = false;\n                        if (readAgainForBranch1) {\n                            pull1Algorithm();\n                        }\n                        else if (readAgainForBranch2) {\n                            pull2Algorithm();\n                        }\n                    });\n                },\n                _closeSteps: () => {\n                    reading = false;\n                    if (!canceled1) {\n                        ReadableByteStreamControllerClose(branch1._readableStreamController);\n                    }\n                    if (!canceled2) {\n                        ReadableByteStreamControllerClose(branch2._readableStreamController);\n                    }\n                    if (branch1._readableStreamController._pendingPullIntos.length > 0) {\n                        ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);\n                    }\n                    if (branch2._readableStreamController._pendingPullIntos.length > 0) {\n                        ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);\n                    }\n                    if (!canceled1 || !canceled2) {\n                        resolveCancelPromise(undefined);\n                    }\n                },\n                _errorSteps: () => {\n                    reading = false;\n                }\n            };\n            ReadableStreamDefaultReaderRead(reader, readRequest);\n        }\n        function pullWithBYOBReader(view, forBranch2) {\n            if (IsReadableStreamDefaultReader(reader)) {\n                ReadableStreamReaderGenericRelease(reader);\n                reader = AcquireReadableStreamBYOBReader(stream);\n                forwardReaderError(reader);\n            }\n            const byobBranch = forBranch2 ? branch2 : branch1;\n            const otherBranch = forBranch2 ? branch1 : branch2;\n            const readIntoRequest = {\n                _chunkSteps: chunk => {\n                    // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using\n                    // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let\n                    // successful synchronously-available reads get ahead of asynchronously-available errors.\n                    _queueMicrotask(() => {\n                        readAgainForBranch1 = false;\n                        readAgainForBranch2 = false;\n                        const byobCanceled = forBranch2 ? canceled2 : canceled1;\n                        const otherCanceled = forBranch2 ? canceled1 : canceled2;\n                        if (!otherCanceled) {\n                            let clonedChunk;\n                            try {\n                                clonedChunk = CloneAsUint8Array(chunk);\n                            }\n                            catch (cloneE) {\n                                ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);\n                                ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);\n                                resolveCancelPromise(ReadableStreamCancel(stream, cloneE));\n                                return;\n                            }\n                            if (!byobCanceled) {\n                                ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n                            }\n                            ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);\n                        }\n                        else if (!byobCanceled) {\n                            ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n                        }\n                        reading = false;\n                        if (readAgainForBranch1) {\n                            pull1Algorithm();\n                        }\n                        else if (readAgainForBranch2) {\n                            pull2Algorithm();\n                        }\n                    });\n                },\n                _closeSteps: chunk => {\n                    reading = false;\n                    const byobCanceled = forBranch2 ? canceled2 : canceled1;\n                    const otherCanceled = forBranch2 ? canceled1 : canceled2;\n                    if (!byobCanceled) {\n                        ReadableByteStreamControllerClose(byobBranch._readableStreamController);\n                    }\n                    if (!otherCanceled) {\n                        ReadableByteStreamControllerClose(otherBranch._readableStreamController);\n                    }\n                    if (chunk !== undefined) {\n                        if (!byobCanceled) {\n                            ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);\n                        }\n                        if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {\n                            ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);\n                        }\n                    }\n                    if (!byobCanceled || !otherCanceled) {\n                        resolveCancelPromise(undefined);\n                    }\n                },\n                _errorSteps: () => {\n                    reading = false;\n                }\n            };\n            ReadableStreamBYOBReaderRead(reader, view, 1, readIntoRequest);\n        }\n        function pull1Algorithm() {\n            if (reading) {\n                readAgainForBranch1 = true;\n                return promiseResolvedWith(undefined);\n            }\n            reading = true;\n            const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);\n            if (byobRequest === null) {\n                pullWithDefaultReader();\n            }\n            else {\n                pullWithBYOBReader(byobRequest._view, false);\n            }\n            return promiseResolvedWith(undefined);\n        }\n        function pull2Algorithm() {\n            if (reading) {\n                readAgainForBranch2 = true;\n                return promiseResolvedWith(undefined);\n            }\n            reading = true;\n            const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);\n            if (byobRequest === null) {\n                pullWithDefaultReader();\n            }\n            else {\n                pullWithBYOBReader(byobRequest._view, true);\n            }\n            return promiseResolvedWith(undefined);\n        }\n        function cancel1Algorithm(reason) {\n            canceled1 = true;\n            reason1 = reason;\n            if (canceled2) {\n                const compositeReason = CreateArrayFromList([reason1, reason2]);\n                const cancelResult = ReadableStreamCancel(stream, compositeReason);\n                resolveCancelPromise(cancelResult);\n            }\n            return cancelPromise;\n        }\n        function cancel2Algorithm(reason) {\n            canceled2 = true;\n            reason2 = reason;\n            if (canceled1) {\n                const compositeReason = CreateArrayFromList([reason1, reason2]);\n                const cancelResult = ReadableStreamCancel(stream, compositeReason);\n                resolveCancelPromise(cancelResult);\n            }\n            return cancelPromise;\n        }\n        function startAlgorithm() {\n            return;\n        }\n        branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);\n        branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);\n        forwardReaderError(reader);\n        return [branch1, branch2];\n    }\n\n    function isReadableStreamLike(stream) {\n        return typeIsObject(stream) && typeof stream.getReader !== 'undefined';\n    }\n\n    function ReadableStreamFrom(source) {\n        if (isReadableStreamLike(source)) {\n            return ReadableStreamFromDefaultReader(source.getReader());\n        }\n        return ReadableStreamFromIterable(source);\n    }\n    function ReadableStreamFromIterable(asyncIterable) {\n        let stream;\n        const iteratorRecord = GetIterator(asyncIterable, 'async');\n        const startAlgorithm = noop;\n        function pullAlgorithm() {\n            let nextResult;\n            try {\n                nextResult = IteratorNext(iteratorRecord);\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            const nextPromise = promiseResolvedWith(nextResult);\n            return transformPromiseWith(nextPromise, iterResult => {\n                if (!typeIsObject(iterResult)) {\n                    throw new TypeError('The promise returned by the iterator.next() method must fulfill with an object');\n                }\n                const done = IteratorComplete(iterResult);\n                if (done) {\n                    ReadableStreamDefaultControllerClose(stream._readableStreamController);\n                }\n                else {\n                    const value = IteratorValue(iterResult);\n                    ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n                }\n            });\n        }\n        function cancelAlgorithm(reason) {\n            const iterator = iteratorRecord.iterator;\n            let returnMethod;\n            try {\n                returnMethod = GetMethod(iterator, 'return');\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            if (returnMethod === undefined) {\n                return promiseResolvedWith(undefined);\n            }\n            let returnResult;\n            try {\n                returnResult = reflectCall(returnMethod, iterator, [reason]);\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            const returnPromise = promiseResolvedWith(returnResult);\n            return transformPromiseWith(returnPromise, iterResult => {\n                if (!typeIsObject(iterResult)) {\n                    throw new TypeError('The promise returned by the iterator.return() method must fulfill with an object');\n                }\n                return undefined;\n            });\n        }\n        stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n        return stream;\n    }\n    function ReadableStreamFromDefaultReader(reader) {\n        let stream;\n        const startAlgorithm = noop;\n        function pullAlgorithm() {\n            let readPromise;\n            try {\n                readPromise = reader.read();\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            return transformPromiseWith(readPromise, readResult => {\n                if (!typeIsObject(readResult)) {\n                    throw new TypeError('The promise returned by the reader.read() method must fulfill with an object');\n                }\n                if (readResult.done) {\n                    ReadableStreamDefaultControllerClose(stream._readableStreamController);\n                }\n                else {\n                    const value = readResult.value;\n                    ReadableStreamDefaultControllerEnqueue(stream._readableStreamController, value);\n                }\n            });\n        }\n        function cancelAlgorithm(reason) {\n            try {\n                return promiseResolvedWith(reader.cancel(reason));\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n        }\n        stream = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, 0);\n        return stream;\n    }\n\n    function convertUnderlyingDefaultOrByteSource(source, context) {\n        assertDictionary(source, context);\n        const original = source;\n        const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize;\n        const cancel = original === null || original === void 0 ? void 0 : original.cancel;\n        const pull = original === null || original === void 0 ? void 0 : original.pull;\n        const start = original === null || original === void 0 ? void 0 : original.start;\n        const type = original === null || original === void 0 ? void 0 : original.type;\n        return {\n            autoAllocateChunkSize: autoAllocateChunkSize === undefined ?\n                undefined :\n                convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`),\n            cancel: cancel === undefined ?\n                undefined :\n                convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`),\n            pull: pull === undefined ?\n                undefined :\n                convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`),\n            start: start === undefined ?\n                undefined :\n                convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`),\n            type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)\n        };\n    }\n    function convertUnderlyingSourceCancelCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (reason) => promiseCall(fn, original, [reason]);\n    }\n    function convertUnderlyingSourcePullCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (controller) => promiseCall(fn, original, [controller]);\n    }\n    function convertUnderlyingSourceStartCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (controller) => reflectCall(fn, original, [controller]);\n    }\n    function convertReadableStreamType(type, context) {\n        type = `${type}`;\n        if (type !== 'bytes') {\n            throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);\n        }\n        return type;\n    }\n\n    function convertIteratorOptions(options, context) {\n        assertDictionary(options, context);\n        const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;\n        return { preventCancel: Boolean(preventCancel) };\n    }\n\n    function convertPipeOptions(options, context) {\n        assertDictionary(options, context);\n        const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort;\n        const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;\n        const preventClose = options === null || options === void 0 ? void 0 : options.preventClose;\n        const signal = options === null || options === void 0 ? void 0 : options.signal;\n        if (signal !== undefined) {\n            assertAbortSignal(signal, `${context} has member 'signal' that`);\n        }\n        return {\n            preventAbort: Boolean(preventAbort),\n            preventCancel: Boolean(preventCancel),\n            preventClose: Boolean(preventClose),\n            signal\n        };\n    }\n    function assertAbortSignal(signal, context) {\n        if (!isAbortSignal(signal)) {\n            throw new TypeError(`${context} is not an AbortSignal.`);\n        }\n    }\n\n    function convertReadableWritablePair(pair, context) {\n        assertDictionary(pair, context);\n        const readable = pair === null || pair === void 0 ? void 0 : pair.readable;\n        assertRequiredField(readable, 'readable', 'ReadableWritablePair');\n        assertReadableStream(readable, `${context} has member 'readable' that`);\n        const writable = pair === null || pair === void 0 ? void 0 : pair.writable;\n        assertRequiredField(writable, 'writable', 'ReadableWritablePair');\n        assertWritableStream(writable, `${context} has member 'writable' that`);\n        return { readable, writable };\n    }\n\n    /**\n     * A readable stream represents a source of data, from which you can read.\n     *\n     * @public\n     */\n    class ReadableStream {\n        constructor(rawUnderlyingSource = {}, rawStrategy = {}) {\n            if (rawUnderlyingSource === undefined) {\n                rawUnderlyingSource = null;\n            }\n            else {\n                assertObject(rawUnderlyingSource, 'First parameter');\n            }\n            const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');\n            const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');\n            InitializeReadableStream(this);\n            if (underlyingSource.type === 'bytes') {\n                if (strategy.size !== undefined) {\n                    throw new RangeError('The strategy for a byte stream cannot have a size function');\n                }\n                const highWaterMark = ExtractHighWaterMark(strategy, 0);\n                SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark);\n            }\n            else {\n                const sizeAlgorithm = ExtractSizeAlgorithm(strategy);\n                const highWaterMark = ExtractHighWaterMark(strategy, 1);\n                SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm);\n            }\n        }\n        /**\n         * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.\n         */\n        get locked() {\n            if (!IsReadableStream(this)) {\n                throw streamBrandCheckException$1('locked');\n            }\n            return IsReadableStreamLocked(this);\n        }\n        /**\n         * Cancels the stream, signaling a loss of interest in the stream by a consumer.\n         *\n         * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}\n         * method, which might or might not use it.\n         */\n        cancel(reason = undefined) {\n            if (!IsReadableStream(this)) {\n                return promiseRejectedWith(streamBrandCheckException$1('cancel'));\n            }\n            if (IsReadableStreamLocked(this)) {\n                return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));\n            }\n            return ReadableStreamCancel(this, reason);\n        }\n        getReader(rawOptions = undefined) {\n            if (!IsReadableStream(this)) {\n                throw streamBrandCheckException$1('getReader');\n            }\n            const options = convertReaderOptions(rawOptions, 'First parameter');\n            if (options.mode === undefined) {\n                return AcquireReadableStreamDefaultReader(this);\n            }\n            return AcquireReadableStreamBYOBReader(this);\n        }\n        pipeThrough(rawTransform, rawOptions = {}) {\n            if (!IsReadableStream(this)) {\n                throw streamBrandCheckException$1('pipeThrough');\n            }\n            assertRequiredArgument(rawTransform, 1, 'pipeThrough');\n            const transform = convertReadableWritablePair(rawTransform, 'First parameter');\n            const options = convertPipeOptions(rawOptions, 'Second parameter');\n            if (IsReadableStreamLocked(this)) {\n                throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');\n            }\n            if (IsWritableStreamLocked(transform.writable)) {\n                throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');\n            }\n            const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal);\n            setPromiseIsHandledToTrue(promise);\n            return transform.readable;\n        }\n        pipeTo(destination, rawOptions = {}) {\n            if (!IsReadableStream(this)) {\n                return promiseRejectedWith(streamBrandCheckException$1('pipeTo'));\n            }\n            if (destination === undefined) {\n                return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);\n            }\n            if (!IsWritableStream(destination)) {\n                return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`));\n            }\n            let options;\n            try {\n                options = convertPipeOptions(rawOptions, 'Second parameter');\n            }\n            catch (e) {\n                return promiseRejectedWith(e);\n            }\n            if (IsReadableStreamLocked(this)) {\n                return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream'));\n            }\n            if (IsWritableStreamLocked(destination)) {\n                return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream'));\n            }\n            return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal);\n        }\n        /**\n         * Tees this readable stream, returning a two-element array containing the two resulting branches as\n         * new {@link ReadableStream} instances.\n         *\n         * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.\n         * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be\n         * propagated to the stream's underlying source.\n         *\n         * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,\n         * this could allow interference between the two branches.\n         */\n        tee() {\n            if (!IsReadableStream(this)) {\n                throw streamBrandCheckException$1('tee');\n            }\n            const branches = ReadableStreamTee(this);\n            return CreateArrayFromList(branches);\n        }\n        values(rawOptions = undefined) {\n            if (!IsReadableStream(this)) {\n                throw streamBrandCheckException$1('values');\n            }\n            const options = convertIteratorOptions(rawOptions, 'First parameter');\n            return AcquireReadableStreamAsyncIterator(this, options.preventCancel);\n        }\n        [SymbolAsyncIterator](options) {\n            // Stub implementation, overridden below\n            return this.values(options);\n        }\n        /**\n         * Creates a new ReadableStream wrapping the provided iterable or async iterable.\n         *\n         * This can be used to adapt various kinds of objects into a readable stream,\n         * such as an array, an async generator, or a Node.js readable stream.\n         */\n        static from(asyncIterable) {\n            return ReadableStreamFrom(asyncIterable);\n        }\n    }\n    Object.defineProperties(ReadableStream, {\n        from: { enumerable: true }\n    });\n    Object.defineProperties(ReadableStream.prototype, {\n        cancel: { enumerable: true },\n        getReader: { enumerable: true },\n        pipeThrough: { enumerable: true },\n        pipeTo: { enumerable: true },\n        tee: { enumerable: true },\n        values: { enumerable: true },\n        locked: { enumerable: true }\n    });\n    setFunctionName(ReadableStream.from, 'from');\n    setFunctionName(ReadableStream.prototype.cancel, 'cancel');\n    setFunctionName(ReadableStream.prototype.getReader, 'getReader');\n    setFunctionName(ReadableStream.prototype.pipeThrough, 'pipeThrough');\n    setFunctionName(ReadableStream.prototype.pipeTo, 'pipeTo');\n    setFunctionName(ReadableStream.prototype.tee, 'tee');\n    setFunctionName(ReadableStream.prototype.values, 'values');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ReadableStream.prototype, Symbol.toStringTag, {\n            value: 'ReadableStream',\n            configurable: true\n        });\n    }\n    Object.defineProperty(ReadableStream.prototype, SymbolAsyncIterator, {\n        value: ReadableStream.prototype.values,\n        writable: true,\n        configurable: true\n    });\n    // Abstract operations for the ReadableStream.\n    // Throws if and only if startAlgorithm throws.\n    function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {\n        const stream = Object.create(ReadableStream.prototype);\n        InitializeReadableStream(stream);\n        const controller = Object.create(ReadableStreamDefaultController.prototype);\n        SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);\n        return stream;\n    }\n    // Throws if and only if startAlgorithm throws.\n    function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) {\n        const stream = Object.create(ReadableStream.prototype);\n        InitializeReadableStream(stream);\n        const controller = Object.create(ReadableByteStreamController.prototype);\n        SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);\n        return stream;\n    }\n    function InitializeReadableStream(stream) {\n        stream._state = 'readable';\n        stream._reader = undefined;\n        stream._storedError = undefined;\n        stream._disturbed = false;\n    }\n    function IsReadableStream(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {\n            return false;\n        }\n        return x instanceof ReadableStream;\n    }\n    function IsReadableStreamLocked(stream) {\n        if (stream._reader === undefined) {\n            return false;\n        }\n        return true;\n    }\n    // ReadableStream API exposed for controllers.\n    function ReadableStreamCancel(stream, reason) {\n        stream._disturbed = true;\n        if (stream._state === 'closed') {\n            return promiseResolvedWith(undefined);\n        }\n        if (stream._state === 'errored') {\n            return promiseRejectedWith(stream._storedError);\n        }\n        ReadableStreamClose(stream);\n        const reader = stream._reader;\n        if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {\n            const readIntoRequests = reader._readIntoRequests;\n            reader._readIntoRequests = new SimpleQueue();\n            readIntoRequests.forEach(readIntoRequest => {\n                readIntoRequest._closeSteps(undefined);\n            });\n        }\n        const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);\n        return transformPromiseWith(sourceCancelPromise, noop);\n    }\n    function ReadableStreamClose(stream) {\n        stream._state = 'closed';\n        const reader = stream._reader;\n        if (reader === undefined) {\n            return;\n        }\n        defaultReaderClosedPromiseResolve(reader);\n        if (IsReadableStreamDefaultReader(reader)) {\n            const readRequests = reader._readRequests;\n            reader._readRequests = new SimpleQueue();\n            readRequests.forEach(readRequest => {\n                readRequest._closeSteps();\n            });\n        }\n    }\n    function ReadableStreamError(stream, e) {\n        stream._state = 'errored';\n        stream._storedError = e;\n        const reader = stream._reader;\n        if (reader === undefined) {\n            return;\n        }\n        defaultReaderClosedPromiseReject(reader, e);\n        if (IsReadableStreamDefaultReader(reader)) {\n            ReadableStreamDefaultReaderErrorReadRequests(reader, e);\n        }\n        else {\n            ReadableStreamBYOBReaderErrorReadIntoRequests(reader, e);\n        }\n    }\n    // Helper functions for the ReadableStream.\n    function streamBrandCheckException$1(name) {\n        return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);\n    }\n\n    function convertQueuingStrategyInit(init, context) {\n        assertDictionary(init, context);\n        const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;\n        assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');\n        return {\n            highWaterMark: convertUnrestrictedDouble(highWaterMark)\n        };\n    }\n\n    // The size function must not have a prototype property nor be a constructor\n    const byteLengthSizeFunction = (chunk) => {\n        return chunk.byteLength;\n    };\n    setFunctionName(byteLengthSizeFunction, 'size');\n    /**\n     * A queuing strategy that counts the number of bytes in each chunk.\n     *\n     * @public\n     */\n    class ByteLengthQueuingStrategy {\n        constructor(options) {\n            assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');\n            options = convertQueuingStrategyInit(options, 'First parameter');\n            this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;\n        }\n        /**\n         * Returns the high water mark provided to the constructor.\n         */\n        get highWaterMark() {\n            if (!IsByteLengthQueuingStrategy(this)) {\n                throw byteLengthBrandCheckException('highWaterMark');\n            }\n            return this._byteLengthQueuingStrategyHighWaterMark;\n        }\n        /**\n         * Measures the size of `chunk` by returning the value of its `byteLength` property.\n         */\n        get size() {\n            if (!IsByteLengthQueuingStrategy(this)) {\n                throw byteLengthBrandCheckException('size');\n            }\n            return byteLengthSizeFunction;\n        }\n    }\n    Object.defineProperties(ByteLengthQueuingStrategy.prototype, {\n        highWaterMark: { enumerable: true },\n        size: { enumerable: true }\n    });\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(ByteLengthQueuingStrategy.prototype, Symbol.toStringTag, {\n            value: 'ByteLengthQueuingStrategy',\n            configurable: true\n        });\n    }\n    // Helper functions for the ByteLengthQueuingStrategy.\n    function byteLengthBrandCheckException(name) {\n        return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);\n    }\n    function IsByteLengthQueuingStrategy(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {\n            return false;\n        }\n        return x instanceof ByteLengthQueuingStrategy;\n    }\n\n    // The size function must not have a prototype property nor be a constructor\n    const countSizeFunction = () => {\n        return 1;\n    };\n    setFunctionName(countSizeFunction, 'size');\n    /**\n     * A queuing strategy that counts the number of chunks.\n     *\n     * @public\n     */\n    class CountQueuingStrategy {\n        constructor(options) {\n            assertRequiredArgument(options, 1, 'CountQueuingStrategy');\n            options = convertQueuingStrategyInit(options, 'First parameter');\n            this._countQueuingStrategyHighWaterMark = options.highWaterMark;\n        }\n        /**\n         * Returns the high water mark provided to the constructor.\n         */\n        get highWaterMark() {\n            if (!IsCountQueuingStrategy(this)) {\n                throw countBrandCheckException('highWaterMark');\n            }\n            return this._countQueuingStrategyHighWaterMark;\n        }\n        /**\n         * Measures the size of `chunk` by always returning 1.\n         * This ensures that the total queue size is a count of the number of chunks in the queue.\n         */\n        get size() {\n            if (!IsCountQueuingStrategy(this)) {\n                throw countBrandCheckException('size');\n            }\n            return countSizeFunction;\n        }\n    }\n    Object.defineProperties(CountQueuingStrategy.prototype, {\n        highWaterMark: { enumerable: true },\n        size: { enumerable: true }\n    });\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(CountQueuingStrategy.prototype, Symbol.toStringTag, {\n            value: 'CountQueuingStrategy',\n            configurable: true\n        });\n    }\n    // Helper functions for the CountQueuingStrategy.\n    function countBrandCheckException(name) {\n        return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);\n    }\n    function IsCountQueuingStrategy(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {\n            return false;\n        }\n        return x instanceof CountQueuingStrategy;\n    }\n\n    function convertTransformer(original, context) {\n        assertDictionary(original, context);\n        const cancel = original === null || original === void 0 ? void 0 : original.cancel;\n        const flush = original === null || original === void 0 ? void 0 : original.flush;\n        const readableType = original === null || original === void 0 ? void 0 : original.readableType;\n        const start = original === null || original === void 0 ? void 0 : original.start;\n        const transform = original === null || original === void 0 ? void 0 : original.transform;\n        const writableType = original === null || original === void 0 ? void 0 : original.writableType;\n        return {\n            cancel: cancel === undefined ?\n                undefined :\n                convertTransformerCancelCallback(cancel, original, `${context} has member 'cancel' that`),\n            flush: flush === undefined ?\n                undefined :\n                convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`),\n            readableType,\n            start: start === undefined ?\n                undefined :\n                convertTransformerStartCallback(start, original, `${context} has member 'start' that`),\n            transform: transform === undefined ?\n                undefined :\n                convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`),\n            writableType\n        };\n    }\n    function convertTransformerFlushCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (controller) => promiseCall(fn, original, [controller]);\n    }\n    function convertTransformerStartCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (controller) => reflectCall(fn, original, [controller]);\n    }\n    function convertTransformerTransformCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);\n    }\n    function convertTransformerCancelCallback(fn, original, context) {\n        assertFunction(fn, context);\n        return (reason) => promiseCall(fn, original, [reason]);\n    }\n\n    // Class TransformStream\n    /**\n     * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},\n     * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.\n     * In a manner specific to the transform stream in question, writes to the writable side result in new data being\n     * made available for reading from the readable side.\n     *\n     * @public\n     */\n    class TransformStream {\n        constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) {\n            if (rawTransformer === undefined) {\n                rawTransformer = null;\n            }\n            const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');\n            const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');\n            const transformer = convertTransformer(rawTransformer, 'First parameter');\n            if (transformer.readableType !== undefined) {\n                throw new RangeError('Invalid readableType specified');\n            }\n            if (transformer.writableType !== undefined) {\n                throw new RangeError('Invalid writableType specified');\n            }\n            const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);\n            const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);\n            const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);\n            const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);\n            let startPromise_resolve;\n            const startPromise = newPromise(resolve => {\n                startPromise_resolve = resolve;\n            });\n            InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm);\n            SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);\n            if (transformer.start !== undefined) {\n                startPromise_resolve(transformer.start(this._transformStreamController));\n            }\n            else {\n                startPromise_resolve(undefined);\n            }\n        }\n        /**\n         * The readable side of the transform stream.\n         */\n        get readable() {\n            if (!IsTransformStream(this)) {\n                throw streamBrandCheckException('readable');\n            }\n            return this._readable;\n        }\n        /**\n         * The writable side of the transform stream.\n         */\n        get writable() {\n            if (!IsTransformStream(this)) {\n                throw streamBrandCheckException('writable');\n            }\n            return this._writable;\n        }\n    }\n    Object.defineProperties(TransformStream.prototype, {\n        readable: { enumerable: true },\n        writable: { enumerable: true }\n    });\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(TransformStream.prototype, Symbol.toStringTag, {\n            value: 'TransformStream',\n            configurable: true\n        });\n    }\n    function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) {\n        function startAlgorithm() {\n            return startPromise;\n        }\n        function writeAlgorithm(chunk) {\n            return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);\n        }\n        function abortAlgorithm(reason) {\n            return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);\n        }\n        function closeAlgorithm() {\n            return TransformStreamDefaultSinkCloseAlgorithm(stream);\n        }\n        stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm);\n        function pullAlgorithm() {\n            return TransformStreamDefaultSourcePullAlgorithm(stream);\n        }\n        function cancelAlgorithm(reason) {\n            return TransformStreamDefaultSourceCancelAlgorithm(stream, reason);\n        }\n        stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm);\n        // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.\n        stream._backpressure = undefined;\n        stream._backpressureChangePromise = undefined;\n        stream._backpressureChangePromise_resolve = undefined;\n        TransformStreamSetBackpressure(stream, true);\n        stream._transformStreamController = undefined;\n    }\n    function IsTransformStream(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {\n            return false;\n        }\n        return x instanceof TransformStream;\n    }\n    // This is a no-op if both sides are already errored.\n    function TransformStreamError(stream, e) {\n        ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);\n        TransformStreamErrorWritableAndUnblockWrite(stream, e);\n    }\n    function TransformStreamErrorWritableAndUnblockWrite(stream, e) {\n        TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);\n        WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);\n        TransformStreamUnblockWrite(stream);\n    }\n    function TransformStreamUnblockWrite(stream) {\n        if (stream._backpressure) {\n            // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()\n            // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time\n            // _backpressure is set.\n            TransformStreamSetBackpressure(stream, false);\n        }\n    }\n    function TransformStreamSetBackpressure(stream, backpressure) {\n        // Passes also when called during construction.\n        if (stream._backpressureChangePromise !== undefined) {\n            stream._backpressureChangePromise_resolve();\n        }\n        stream._backpressureChangePromise = newPromise(resolve => {\n            stream._backpressureChangePromise_resolve = resolve;\n        });\n        stream._backpressure = backpressure;\n    }\n    // Class TransformStreamDefaultController\n    /**\n     * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.\n     *\n     * @public\n     */\n    class TransformStreamDefaultController {\n        constructor() {\n            throw new TypeError('Illegal constructor');\n        }\n        /**\n         * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.\n         */\n        get desiredSize() {\n            if (!IsTransformStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException('desiredSize');\n            }\n            const readableController = this._controlledTransformStream._readable._readableStreamController;\n            return ReadableStreamDefaultControllerGetDesiredSize(readableController);\n        }\n        enqueue(chunk = undefined) {\n            if (!IsTransformStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException('enqueue');\n            }\n            TransformStreamDefaultControllerEnqueue(this, chunk);\n        }\n        /**\n         * Errors both the readable side and the writable side of the controlled transform stream, making all future\n         * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.\n         */\n        error(reason = undefined) {\n            if (!IsTransformStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException('error');\n            }\n            TransformStreamDefaultControllerError(this, reason);\n        }\n        /**\n         * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the\n         * transformer only needs to consume a portion of the chunks written to the writable side.\n         */\n        terminate() {\n            if (!IsTransformStreamDefaultController(this)) {\n                throw defaultControllerBrandCheckException('terminate');\n            }\n            TransformStreamDefaultControllerTerminate(this);\n        }\n    }\n    Object.defineProperties(TransformStreamDefaultController.prototype, {\n        enqueue: { enumerable: true },\n        error: { enumerable: true },\n        terminate: { enumerable: true },\n        desiredSize: { enumerable: true }\n    });\n    setFunctionName(TransformStreamDefaultController.prototype.enqueue, 'enqueue');\n    setFunctionName(TransformStreamDefaultController.prototype.error, 'error');\n    setFunctionName(TransformStreamDefaultController.prototype.terminate, 'terminate');\n    if (typeof Symbol.toStringTag === 'symbol') {\n        Object.defineProperty(TransformStreamDefaultController.prototype, Symbol.toStringTag, {\n            value: 'TransformStreamDefaultController',\n            configurable: true\n        });\n    }\n    // Transform Stream Default Controller Abstract Operations\n    function IsTransformStreamDefaultController(x) {\n        if (!typeIsObject(x)) {\n            return false;\n        }\n        if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {\n            return false;\n        }\n        return x instanceof TransformStreamDefaultController;\n    }\n    function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm) {\n        controller._controlledTransformStream = stream;\n        stream._transformStreamController = controller;\n        controller._transformAlgorithm = transformAlgorithm;\n        controller._flushAlgorithm = flushAlgorithm;\n        controller._cancelAlgorithm = cancelAlgorithm;\n        controller._finishPromise = undefined;\n        controller._finishPromise_resolve = undefined;\n        controller._finishPromise_reject = undefined;\n    }\n    function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) {\n        const controller = Object.create(TransformStreamDefaultController.prototype);\n        let transformAlgorithm;\n        let flushAlgorithm;\n        let cancelAlgorithm;\n        if (transformer.transform !== undefined) {\n            transformAlgorithm = chunk => transformer.transform(chunk, controller);\n        }\n        else {\n            transformAlgorithm = chunk => {\n                try {\n                    TransformStreamDefaultControllerEnqueue(controller, chunk);\n                    return promiseResolvedWith(undefined);\n                }\n                catch (transformResultE) {\n                    return promiseRejectedWith(transformResultE);\n                }\n            };\n        }\n        if (transformer.flush !== undefined) {\n            flushAlgorithm = () => transformer.flush(controller);\n        }\n        else {\n            flushAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        if (transformer.cancel !== undefined) {\n            cancelAlgorithm = reason => transformer.cancel(reason);\n        }\n        else {\n            cancelAlgorithm = () => promiseResolvedWith(undefined);\n        }\n        SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm, cancelAlgorithm);\n    }\n    function TransformStreamDefaultControllerClearAlgorithms(controller) {\n        controller._transformAlgorithm = undefined;\n        controller._flushAlgorithm = undefined;\n        controller._cancelAlgorithm = undefined;\n    }\n    function TransformStreamDefaultControllerEnqueue(controller, chunk) {\n        const stream = controller._controlledTransformStream;\n        const readableController = stream._readable._readableStreamController;\n        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {\n            throw new TypeError('Readable side is not in a state that permits enqueue');\n        }\n        // We throttle transform invocations based on the backpressure of the ReadableStream, but we still\n        // accept TransformStreamDefaultControllerEnqueue() calls.\n        try {\n            ReadableStreamDefaultControllerEnqueue(readableController, chunk);\n        }\n        catch (e) {\n            // This happens when readableStrategy.size() throws.\n            TransformStreamErrorWritableAndUnblockWrite(stream, e);\n            throw stream._readable._storedError;\n        }\n        const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);\n        if (backpressure !== stream._backpressure) {\n            TransformStreamSetBackpressure(stream, true);\n        }\n    }\n    function TransformStreamDefaultControllerError(controller, e) {\n        TransformStreamError(controller._controlledTransformStream, e);\n    }\n    function TransformStreamDefaultControllerPerformTransform(controller, chunk) {\n        const transformPromise = controller._transformAlgorithm(chunk);\n        return transformPromiseWith(transformPromise, undefined, r => {\n            TransformStreamError(controller._controlledTransformStream, r);\n            throw r;\n        });\n    }\n    function TransformStreamDefaultControllerTerminate(controller) {\n        const stream = controller._controlledTransformStream;\n        const readableController = stream._readable._readableStreamController;\n        ReadableStreamDefaultControllerClose(readableController);\n        const error = new TypeError('TransformStream terminated');\n        TransformStreamErrorWritableAndUnblockWrite(stream, error);\n    }\n    // TransformStreamDefaultSink Algorithms\n    function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) {\n        const controller = stream._transformStreamController;\n        if (stream._backpressure) {\n            const backpressureChangePromise = stream._backpressureChangePromise;\n            return transformPromiseWith(backpressureChangePromise, () => {\n                const writable = stream._writable;\n                const state = writable._state;\n                if (state === 'erroring') {\n                    throw writable._storedError;\n                }\n                return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n            });\n        }\n        return TransformStreamDefaultControllerPerformTransform(controller, chunk);\n    }\n    function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) {\n        const controller = stream._transformStreamController;\n        if (controller._finishPromise !== undefined) {\n            return controller._finishPromise;\n        }\n        // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n        const readable = stream._readable;\n        // Assign the _finishPromise now so that if _cancelAlgorithm calls readable.cancel() internally,\n        // we don't run the _cancelAlgorithm again.\n        controller._finishPromise = newPromise((resolve, reject) => {\n            controller._finishPromise_resolve = resolve;\n            controller._finishPromise_reject = reject;\n        });\n        const cancelPromise = controller._cancelAlgorithm(reason);\n        TransformStreamDefaultControllerClearAlgorithms(controller);\n        uponPromise(cancelPromise, () => {\n            if (readable._state === 'errored') {\n                defaultControllerFinishPromiseReject(controller, readable._storedError);\n            }\n            else {\n                ReadableStreamDefaultControllerError(readable._readableStreamController, reason);\n                defaultControllerFinishPromiseResolve(controller);\n            }\n            return null;\n        }, r => {\n            ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n            defaultControllerFinishPromiseReject(controller, r);\n            return null;\n        });\n        return controller._finishPromise;\n    }\n    function TransformStreamDefaultSinkCloseAlgorithm(stream) {\n        const controller = stream._transformStreamController;\n        if (controller._finishPromise !== undefined) {\n            return controller._finishPromise;\n        }\n        // stream._readable cannot change after construction, so caching it across a call to user code is safe.\n        const readable = stream._readable;\n        // Assign the _finishPromise now so that if _flushAlgorithm calls readable.cancel() internally,\n        // we don't also run the _cancelAlgorithm.\n        controller._finishPromise = newPromise((resolve, reject) => {\n            controller._finishPromise_resolve = resolve;\n            controller._finishPromise_reject = reject;\n        });\n        const flushPromise = controller._flushAlgorithm();\n        TransformStreamDefaultControllerClearAlgorithms(controller);\n        uponPromise(flushPromise, () => {\n            if (readable._state === 'errored') {\n                defaultControllerFinishPromiseReject(controller, readable._storedError);\n            }\n            else {\n                ReadableStreamDefaultControllerClose(readable._readableStreamController);\n                defaultControllerFinishPromiseResolve(controller);\n            }\n            return null;\n        }, r => {\n            ReadableStreamDefaultControllerError(readable._readableStreamController, r);\n            defaultControllerFinishPromiseReject(controller, r);\n            return null;\n        });\n        return controller._finishPromise;\n    }\n    // TransformStreamDefaultSource Algorithms\n    function TransformStreamDefaultSourcePullAlgorithm(stream) {\n        // Invariant. Enforced by the promises returned by start() and pull().\n        TransformStreamSetBackpressure(stream, false);\n        // Prevent the next pull() call until there is backpressure.\n        return stream._backpressureChangePromise;\n    }\n    function TransformStreamDefaultSourceCancelAlgorithm(stream, reason) {\n        const controller = stream._transformStreamController;\n        if (controller._finishPromise !== undefined) {\n            return controller._finishPromise;\n        }\n        // stream._writable cannot change after construction, so caching it across a call to user code is safe.\n        const writable = stream._writable;\n        // Assign the _finishPromise now so that if _flushAlgorithm calls writable.abort() or\n        // writable.cancel() internally, we don't run the _cancelAlgorithm again, or also run the\n        // _flushAlgorithm.\n        controller._finishPromise = newPromise((resolve, reject) => {\n            controller._finishPromise_resolve = resolve;\n            controller._finishPromise_reject = reject;\n        });\n        const cancelPromise = controller._cancelAlgorithm(reason);\n        TransformStreamDefaultControllerClearAlgorithms(controller);\n        uponPromise(cancelPromise, () => {\n            if (writable._state === 'errored') {\n                defaultControllerFinishPromiseReject(controller, writable._storedError);\n            }\n            else {\n                WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, reason);\n                TransformStreamUnblockWrite(stream);\n                defaultControllerFinishPromiseResolve(controller);\n            }\n            return null;\n        }, r => {\n            WritableStreamDefaultControllerErrorIfNeeded(writable._writableStreamController, r);\n            TransformStreamUnblockWrite(stream);\n            defaultControllerFinishPromiseReject(controller, r);\n            return null;\n        });\n        return controller._finishPromise;\n    }\n    // Helper functions for the TransformStreamDefaultController.\n    function defaultControllerBrandCheckException(name) {\n        return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);\n    }\n    function defaultControllerFinishPromiseResolve(controller) {\n        if (controller._finishPromise_resolve === undefined) {\n            return;\n        }\n        controller._finishPromise_resolve();\n        controller._finishPromise_resolve = undefined;\n        controller._finishPromise_reject = undefined;\n    }\n    function defaultControllerFinishPromiseReject(controller, reason) {\n        if (controller._finishPromise_reject === undefined) {\n            return;\n        }\n        setPromiseIsHandledToTrue(controller._finishPromise);\n        controller._finishPromise_reject(reason);\n        controller._finishPromise_resolve = undefined;\n        controller._finishPromise_reject = undefined;\n    }\n    // Helper functions for the TransformStream.\n    function streamBrandCheckException(name) {\n        return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`);\n    }\n\n    exports.ByteLengthQueuingStrategy = ByteLengthQueuingStrategy;\n    exports.CountQueuingStrategy = CountQueuingStrategy;\n    exports.ReadableByteStreamController = ReadableByteStreamController;\n    exports.ReadableStream = ReadableStream;\n    exports.ReadableStreamBYOBReader = ReadableStreamBYOBReader;\n    exports.ReadableStreamBYOBRequest = ReadableStreamBYOBRequest;\n    exports.ReadableStreamDefaultController = ReadableStreamDefaultController;\n    exports.ReadableStreamDefaultReader = ReadableStreamDefaultReader;\n    exports.TransformStream = TransformStream;\n    exports.TransformStreamDefaultController = TransformStreamDefaultController;\n    exports.WritableStream = WritableStream;\n    exports.WritableStreamDefaultController = WritableStreamDefaultController;\n    exports.WritableStreamDefaultWriter = WritableStreamDefaultWriter;\n\n}));\n//# sourceMappingURL=ponyfill.es2018.js.map\n"],"names":[],"ignoreList":[0],"sourceRoot":""}\n//# sourceURL=webpack-internal:///(action-browser)/./node_modules/web-streams-polyfill/dist/ponyfill.es2018.js\n");
/***/ })
};
;