detached-HTMLCanvasElement.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /mediacapture-image/detached-HTMLCanvasElement.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

<script>

async_test(t => {

  let iframe = document.createElement('iframe');

  let html = "<canvas id='canvas' width=10 height=10></canvas>";

  iframe.srcdoc = html;

  iframe.onload = t.step_func_done(() => {

    // This detaches the frame while retaining a reference to an

    // HTMLCanvasElement from it.

    let canvas = iframe.contentWindow.document.getElementById('canvas');

    document.body.removeChild(iframe);

    // Creation of the ImageCapture object (as part of the MediaStreamTrack)

    // should be safe even if the frame is detached.

    canvas.captureStream();

});

  document.body.appendChild(iframe);

}, 'MediaStreamTrack can be obtained from a detached frame');

</script>

</body>