src/third_party/web_platform_tests/html/browsers/history/the-location-interface/scripted_form_submit_assign_during_load-1.html - cobalt - Git at Google

 <!doctype html>
 <script>
 opener.history_length = history.length;
 </script>
 <form onsubmit="location = 'scripted_form_submit_assign_during_load-2.html'; return false;">
 <input type=submit value="Click Me">
 </form>
 <script>
 document.forms[0].elements[0].click()
 </script>
 <p>Filler image to keep the page loading:</p>
 <img src="/media/2048x1360-random.jpg?pipe=trickle(d1:1:r2)">
	<!doctype html>
	<script>
	opener.history_length = history.length;
	</script>
	<form onsubmit="location = 'scripted_form_submit_assign_during_load-2.html'; return false;">
	<input type=submit value="Click Me">
	</form>
	<script>
	document.forms[0].elements[0].click()
	</script>
	<p>Filler image to keep the page loading:</p>
	<img src="/media/2048x1360-random.jpg?pipe=trickle(d1:1:r2)">