intersection-observer/resources/iframe-no-root-subframe.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!DOCTYPE html>
 <div style="height: 200px; width: 100px;"></div>
 <div id="target" style="background-color: green; width:100px; height:100px"></div>
 <div style="height: 200px; width: 100px;"></div>
	<!DOCTYPE html>
	<div style="height: 200px; width: 100px;"></div>
	<div id="target" style="background-color: green; width:100px; height:100px"></div>
	<div style="height: 200px; width: 100px;"></div>