771639.html - mozsearch

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<!DOCTYPE html>

<script>

var root = document.documentElement;

while(root.firstChild) { root.firstChild.remove(); }

var div = document.createElement("div");

root.appendChild(div);

document.addEventListener("DOMNodeRemoved", function() {

  root.appendChild(document.createTextNode("some mutation"));

});

var range = document.createRange();

range.setStart(root, 0);

range.setEnd(root, root.childNodes.length);

range.deleteContents();

</script>