css/css-anchor-position/position-visibility-anchors-visible-both-position-fixed-ref.html - external/w3c/web-platform-tests.git - Git at Google

 <!DOCTYPE html>
 <meta charset="utf-8">
 <style>
   #target {
     width: 100px;
     height: 100px;
     background: green;
     position: fixed;
     top: 0;
     left: 100px;
   }

   #spacer {
     height: 200vh;
   }
 </style>
 <div id="target">target</div>
 <div id="spacer"></div>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	#target {
	width: 100px;
	height: 100px;
	background: green;
	position: fixed;
	top: 0;
	left: 100px;
	}

	#spacer {
	height: 200vh;
	}
	</style>
	<div id="target">target</div>
	<div id="spacer"></div>