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<html>
<head>
<script>
document.addEventListener("DOMContentLoaded", () => {
// For emulating the traditional behavior, collapse Selection to end of the
// text node at end of the <body> (end of the text node after the <h3>).
getSelection().collapse(
document.body.lastChild,
document.body.lastChild.length
);
const textarea = document.querySelector("textarea");
const abbr = document.querySelector("abbr");
let node;
document.addEventListener("DOMAttrModified", event => {
node = event.originalTarget.getRootNode({});
abbr.insertBefore(textarea, abbr.childNodes[0]);
}, false);
abbr.contentEditable = false;
node.normalize();
document.designMode = "on";
document.execCommand("insertParagraph");
});
</script>
</head>
<body>
<dfn contenteditable>
<abbr></abbr>
</dfn>
<h3>
<textarea autofocus></textarea>
<script></script>
</h3>
</body>
</html>
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