transition-skipped-callback-from-detached-iframe.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:
- /css/css-view-transitions/transition-skipped-callback-from-detached-iframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

  <title>View transitions: callback from detached iframe</title>

  <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">

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

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

</head>

<body>

<script>

promise_test(async t => {

  assert_implements(document.startViewTransition, "Missing document.startViewTransition");

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

  document.body.appendChild(iframe);

  // Create a function in the iframe.

  let fn = iframe.contentWindow.Function("");

  // Detach the iframe, invalidating its context.

  iframe.remove();

  // Start a transition in the main document with the callback from the detached iframe.

  let transition = document.startViewTransition(fn);

  // Skip the transition. This synchronously schedules InvokeDOMChangeCallback.

  transition.skipTransition();

  // Catch expected rejections to prevent unhandled rejection failures.

  transition.ready.catch(() => {});

  transition.updateCallbackDone.catch(() => {});

  // Wait for finished promise to reject.

  try {

    await transition.finished;

    assert_unreached("finished promise should have rejected");

  } catch (e) {

    assert_equals(e.name, "AbortError", "finished promise should reject with AbortError");

}, "Using a callback from a detached iframe should not crash");

</script>

</body>

</html>