chromium/src/third_party/blink/web_tests/fast/css/modify-cached-detached-sheet.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <script src="../../resources/testharness.js"></script>
 <script src="../../resources/testharnessreport.js"></script>
 <style>div{}</style>
 <style>div{}</style>
 <script>
     test(() => {
         var sheet = document.styleSheets[0];
         sheet.ownerNode.remove();
         sheet.insertRule("div{}", 0);
     }, "Inserting a rule in a detached sheet should not cause an assert/crash.");
 </script>
 <style>div{}</style>
	<!DOCTYPE html>
	<script src="../../resources/testharness.js"></script>
	<script src="../../resources/testharnessreport.js"></script>
	<style>div{}</style>
	<style>div{}</style>
	<script>
	test(() => {
	var sheet = document.styleSheets[0];
	sheet.ownerNode.remove();
	sheet.insertRule("div{}", 0);
	}, "Inserting a rule in a detached sheet should not cause an assert/crash.");
	</script>
	<style>div{}</style>