css/css-backgrounds/child-move-reveals-parent-background-ref.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!DOCTYPE html>
 <style>
   #parent {
     width: 150px;
     height: 150px;
     background-color: green;
   }
 </style>
 <p>There should be a green square below.</p>
 <div id="parent"></div>
	<!DOCTYPE html>
	<style>
	#parent {
	width: 150px;
	height: 150px;
	background-color: green;
	}
	</style>
	<p>There should be a green square below.</p>
	<div id="parent"></div>