window-onerror-event-throw-null.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/webappapis/scripting/processing-model-2/window-onerror-event-throw-null.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="UTF-8">

<title>window.onerror: throwing null in event listeners</title>

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

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

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

<script>

  "use strict";

  setup({ allow_uncaught_exception: true });

  test(() => {

    let errorEvents = 0;

    let errorEvent;

    window.addEventListener("error", event => {

      errorEvent = event;

      ++errorEvents;

});

    const element = document.createElement("div");

    element.addEventListener("click", () => {

      throw null; // eslint-disable-line no-throw-literal

});

    element.dispatchEvent(new Event("click"));

    assert_equals(errorEvents, 1);

    assert_equals(typeof errorEvent.message, "string");

    assert_equals(errorEvent.error, null);

  }, "Throwing null in event listener");

</script>