chromium/src/third_party/blink/renderer/core/testing/data/trivial-scroller.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE HTML>
 <style>
 #scroller {
   width: 100px;
   height: 100px;
   overflow: scroll;
   will-change: transform;
 }
 .scrolled {
   background: blue;
   width: 50px;
   height: 180px;
 }
 </style>
 <div id="scroller">
   <div class="scrolled"></div>
 </div>
	<!DOCTYPE HTML>
	<style>
	#scroller {
	width: 100px;
	height: 100px;
	overflow: scroll;
	will-change: transform;
	}
	.scrolled {
	background: blue;
	width: 50px;
	height: 180px;
	}
	</style>
	<div id="scroller">
	<div class="scrolled"></div>
	</div>