frameset-element-synthetic-event.html

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This WPT test may be referenced by the following Test IDs:
- /html/webappapis/scripting/events/event-handler-processing-algorithm-error/frameset-element-synthetic-event.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Event handlers processing algorithm: error events</title>

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

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

<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-event-handler-processing-algorithm">

<iframe name="framesetWindow" src="resources/frameset-frame.html"></iframe>

<div id="log"></div>

<script>

"use strict";

setup({ allow_uncaught_exception: true });

window.onload = () => {

const frameset = framesetWindow.document.querySelector("frameset");

promise_test(t => {

  frameset.onerror = t.step_func((...args) => {

    assert_equals(args.length, 1);

    return true;

});

  const eventWatcher = new EventWatcher(t, framesetWindow, "error");

  const promise = eventWatcher.wait_for("error").then(e => {

    assert_equals(e.defaultPrevented, false);

});

  frameset.dispatchEvent(new Event("error", { bubbles: true, cancelable: true }));

  return promise;

}, "error event is normal (return true does not cancel; one arg) on Window, with a synthetic Event");

};

</script>