chromium/src/third_party/blink/web_tests/fast/css/containment/paint-containment-with-fixed-position.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <style>
 div {
     width: 100px;
     height: 50px;
 }
 .container {
     contain: paint;
     background-color: green;
 }
 .fixed {
     position: fixed;
     top: 0px;
     left: 100px;
     background-color: red;
 }
 .inline {
     display: inline-block;
 }
 </style>
 <body>
 <div class="container"><div class="fixed"></div></div>
 <div class="container inline"><div class="fixed"></div></div>
	<!DOCTYPE html>
	<style>
	div {
	width: 100px;
	height: 50px;
	}
	.container {
	contain: paint;
	background-color: green;
	}
	.fixed {
	position: fixed;
	top: 0px;
	left: 100px;
	background-color: red;
	}
	.inline {
	display: inline-block;
	}
	</style>
	<body>
	<div class="container"><div class="fixed"></div></div>
	<div class="container inline"><div class="fixed"></div></div>