test_getUserMedia_permission_iframe.html

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<!DOCTYPE HTML>

<html>

<body>

<pre id="test">

<script type="application/javascript">

/**

  Runs inside iframe in test_getUserMedia_permission.html.

*/

const gUM = c => navigator.mediaDevices.getUserMedia(c);

(async () => {

  let message;

  let stream;

  try {

    stream = await gUM({ video: true });

    message = "success";

  } catch(e) {

    message = e.name;

  parent.postMessage(message, "https://example.com:443");

  if (message == "success") {

    stream.getTracks().forEach(track => track.stop());

})().catch(e => setTimeout(() => { throw e; }));

</script>

</pre>

</body>

</html>