with-exceptions.html

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This WPT test may be referenced by the following Test IDs:
- /custom-elements/reactions/with-exceptions.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Custom Elements: CEReactions interaction with exceptions</title>

<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">

<meta name="help" content="https://html.spec.whatwg.org/multipage/#cereactions">

<meta name="help" content="https://github.com/whatwg/html/pull/3235">

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

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

<script src="../resources/custom-elements-helpers.js"></script>

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

<script>

"use strict";

// Basically from https://github.com/whatwg/html/issues/3217#issuecomment-343633273

test_with_window((contentWindow, contentDocument) => {

  let reactionRan = false;

  contentWindow.customElements.define("custom-element", class extends contentWindow.HTMLElement {

    disconnectedCallback() {

      reactionRan = true;

});

  const text = contentDocument.createTextNode("");

  contentDocument.documentElement.appendChild(text);

  const element = contentDocument.createElement("custom-element");

  contentDocument.documentElement.appendChild(element);

  assert_throws_dom(

    "HierarchyRequestError",

    contentWindow.DOMException,

    () => text.before("", contentDocument.documentElement)

);

  assert_true(reactionRan);

}, "Reaction must run even after the exception is thrown");

</script>