testing/web-platform/tests/editing/crashtests/selection-modify-extend-backward-character-to-outside-body-in-designMode.html


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<!DOCTYPE html>
<meta charset="utf-8">
<script>
onload = () => {
  document.designMode = 'on';
  getSelection().selectAllChildren(document.body);
  getSelection().modify('extend', 'backward', 'character');
};
</script>
<audio controls>