<html lang="en-GB"><head><title>My app</title><style>my-app{display:block}</style><link rel="modulepreload" href="app.js" as="script"></head><body><h1><span>Hello world!</span></h1><my-app></my-app><script>"noModule"in HTMLScriptElement.prototype?window.importShim("./app.js"):System.import("./legacy/app.js")</script></body></html>