File: selection-modify-line-boundary-around-empty-details.html

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<!doctype html>
<html class="test-wait">
<head>
<meta charset="utf-8">
<script>
"use strict";

addEventListener("load", () => {
  let i = 0;
  const details = document.querySelector("details");
  const id = setInterval(() => {
    getSelection().modify("move", "forward", "lineboundary");
    if (details.isConnected) {
      details.outerHTML = undefined;
    }
    if (++i == 5) {
      document.documentElement.removeAttribute("class");
      clearInterval(id);
    }
  }, 0);
  document.execCommand("selectAll");
}, {once: true});
</script>
</head>
<body>
<details>a</details>
<span contenteditable></span>
</body>
</html>