editing/crashtests/selectall-selection-modify-move-forward-lineboundary-selectall-around-editable-canvas.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!DOCTYPE html>
 <meta charset="utf-8">
 <script>
 onload = () => {
   document.querySelector("canvas[contenteditable]").blur();
   document.execCommand("selectAll", false);
   getSelection().modify("move", "forward", "lineboundary");
   document.execCommand("selectAll", false);
 };
 </script>
 <canvas contenteditable="true">
 <audio controls>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<script>
	onload = () => {
	document.querySelector("canvas[contenteditable]").blur();
	document.execCommand("selectAll", false);
	getSelection().modify("move", "forward", "lineboundary");
	document.execCommand("selectAll", false);
	};
	</script>
	<canvas contenteditable="true">
	<audio controls>