chromium/src/third_party/blink/web_tests/virtual/text-antialias/whitespace/reattach-before-pseudo-nondistributed-whitespace.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <style>
   #host::before { content: "A" }
   #host.block::before { display: block }
 </style>
 <p>You should see a space between A and B below.</p>
 <div id="host" class="block"> </div>
 <script>
   host.offsetTop;
   var root = host.attachShadow({mode:"open"});
   root.innerHTML = " <span>B</span>";
   host.className = "";
 </script>
	<!DOCTYPE html>
	<style>
	#host::before { content: "A" }
	#host.block::before { display: block }
	</style>
	<p>You should see a space between A and B below.</p>
	<div id="host" class="block"> </div>
	<script>
	host.offsetTop;
	var root = host.attachShadow({mode:"open"});
	root.innerHTML = " <span>B</span>";
	host.className = "";
	</script>