htmlportalelement-event-handler-content-attributes.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:
- /portals/htmlportalelement-event-handler-content-attributes.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

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

<script>

// Dispatch of these events is tested elsewhere.

// This test merely ensures that the event handler content attributes work.

let eventNames = ["load", "message", "messageerror"];

test(() => {

  try {

    assert_implements("HTMLPortalElement" in self);

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

    for (let eventName of eventNames) {

      window.testValue = "not fired";

      portal.setAttribute("on" + eventName, "window.testValue = 'fired'");

      portal.dispatchEvent(new Event(eventName));

      assert_equals(window.testValue, "fired", `${eventName} should have fired`);

      window.testValue = "not fired";

      portal.removeAttribute("on" + eventName);

      portal.dispatchEvent(new Event(eventName));

      assert_equals(window.testValue, "not fired", `${eventName} should not have fired`);

  } finally {

    delete window.testValue;

}, "Tests that event handler content attributes for supported event names work.");

</script>