dialog-requestclose-closedby.tentative.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:
- /html/semantics/interactive-elements/the-dialog-element/dialog-requestclose-closedby.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<link rel=help href="https://html.spec.whatwg.org/multipage/interactive-elements.html#dom-dialog-request-close">

<link rel=help href="https://github.com/whatwg/html/issues/12482">

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

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

<link rel="author" href="mailto:lwarlow@igalia.com" />

<dialog id="dialog" closedby="any"></dialog>

<script>

  test(() => {

      dialog.show();

      dialog.oncancel = () => {

          dialog.removeAttribute('closedby');

      dialog.requestClose();

      assert_false(dialog.open);

  }, "requestClose() should close the dialog even when computed closedby becomes none");

</script>