chromium/src/third_party/blink/web_tests/compositing/overflow/fixed-element-escape-fixed-overflow-clip.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <style>
 #scroller {
     position: fixed;
     left: 0;
     top: 0;
     width: 100px;
     height: 100px;
     overflow: scroll;
 }

 #bloat {
     height: 1000px;
 }

 #fixed {
     position: fixed;
     left: 200px;
     top: 200px;
     width: 100px;
     height: 100px;
     background: green;
 }
 </style>
 <div id="scroller">
     <div id="bloat"></div>
     <div id="fixed"></div>
 </div>
 The test passes if a green box is visible on the screen. The purpose of this test is to verify fixed-position elements are not clipped by an ancestor fixed-position overflow clip.
	<!DOCTYPE html>
	<style>
	#scroller {
	position: fixed;
	left: 0;
	top: 0;
	width: 100px;
	height: 100px;
	overflow: scroll;
	}

	#bloat {
	height: 1000px;
	}

	#fixed {
	position: fixed;
	left: 200px;
	top: 200px;
	width: 100px;
	height: 100px;
	background: green;
	}
	</style>
	<div id="scroller">
	<div id="bloat"></div>
	<div id="fixed"></div>
	</div>
	The test passes if a green box is visible on the screen. The purpose of this test is to verify fixed-position elements are not clipped by an ancestor fixed-position overflow clip.