default-summary-selection-ref.html

Enable keyboard shortcuts

<!doctype html>

<html>

<head>

<!-- If you'll change the default summary painted as selected,

     you should make the serializer contain the default summary at copy. -->

</head>

<body>

<p>Preceding Text</p>

<details open><summary style="user-select:none">Details</summary>Details Text</details>

<p>Following Text</p>

<script>

getSelection().selectAllChildren(document.body);

</script>

</body>

</html>