inserthorizontalrule-in-textarea-in-editor-and-undo-on-error-events.html

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This WPT test may be referenced by the following Test IDs:
- /editing/crashtests/inserthorizontalrule-in-textarea-in-editor-and-undo-on-error-events.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html class="test-wait">

<head>

<meta charset="utf-8">

<script>

var count = 0;

function onError() {

  if (++count > 2) {

    document.documentElement.removeAttribute("class");

    return;

  const object = document.getElementById("a");

  const mi = document.getElementById("b");

  object.data = "";

  object.appendChild(document.getElementById("c"));

  mi.appendChild(document.getElementById("c"));

  getSelection().collapse(document.getElementById("c"), 0);

  document.execCommand("undo");

  document.execCommand("insertHorizontalRule");

</script>

</head>

<body>

<textarea id="c">a</textarea>

<dt contenteditable="true">

<mi id="b">#</mi>

<object id="a" onerror="onError()">

</object>

</dt>

</body>

</html>