File: screen-capture.https.html

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thunderbird 1%3A140.3.1esr-1
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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script>

assert_true(document.prerendering);

async function invokeScreenCaptureAPI(){
  const bc = new PrerenderChannel('prerender-channel');

  try {
    await navigator.mediaDevices.getDisplayMedia();
    bc.postMessage('unexpected success');
  } catch (err){
    bc.postMessage(err.name);
  } finally {
    bc.close();
  }
}

invokeScreenCaptureAPI();

</script>