File: remove-right-block-during-joining-with-parent-left-block.html

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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Test removing right block while joining it and parent left block</title>
<script>
addEventListener("load", () => {
  const editingHosts = document.querySelectorAll("div[contenteditable]");
  for (const editingHost of editingHosts) {
    editingHost.focus();
    const rightChildBlock = editingHost.querySelector("div > div > div");
    getSelection().collapse(rightChildBlock.firstChild.firstChild, 0);
    editingHost.addEventListener("DOMSubtreeModified", () => {
      document.body.appendChild(rightChildBlock);
    });
    document.execCommand("delete");
  }
});
</script>
</head>
<body>
  <div contenteditable>
    <div>parent<div><b>child</b></div>parent</div>
  </div>
  <div contenteditable>
    <div>parent<div><b>child<br>2nd line</b></div>parent</div>
  </div>
  <div contenteditable style="white-space:pre">
    <div>parent<div>child
2nd line</div>parent</div>
  </div>
</body>
</html>