<!doctype html>
<html>
  <head>
    <title>cancelAnimationFrame does nothing</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="help" href="https://w3c.github.io/web-performance/specs/RequestAnimationFrame/Overview.html#dom-windowanimationtiming-cancelanimationframe"/>
  </head>
  <body>
    <div id="log"></div>
    <script>
      test(function (t) {
        window.cancelAnimationFrame(42);
        assert_true(true);
     