css/css-contain/reference/contain-layout-select-001-ref.html - external/w3c/web-platform-tests.git - Git at Google

 <!doctype html>
 <style>
 button {
   appearance: none;
   contain: layout;
   width: 20px;
   height: 20px;
   border: 2px solid;
   margin: 5px;
   padding: 2px;
 }
 </style>
 <button></button><button></button>
	<!doctype html>
	<style>
	button {
	appearance: none;
	contain: layout;
	width: 20px;
	height: 20px;
	border: 2px solid;
	margin: 5px;
	padding: 2px;
	}
	</style>
	<button></button><button></button>