chromium/src/third_party/blink/web_tests/fast/history/resources/replaceState-during-beforeunload.html - manifest_repos/chromium_src - Git at Google

 <body>
 <div style="height: 2000px;"></div>
 <script>
 history.back();

 window.onbeforeunload = function() {
     history.replaceState({foo:'bar'}, null, "#");
     window.scrollTo(0, 1000);
 }
 </script>
 </body>
	<body>
	<div style="height: 2000px;"></div>
	<script>
	history.back();

	window.onbeforeunload = function() {
	history.replaceState({foo:'bar'}, null, "#");
	window.scrollTo(0, 1000);
	}
	</script>
	</body>