<!DOCTYPE html>
<style>
#foreground {
position: absolute;
top: 0;
left: 0;
width: 200px;
height: 200px;
background-color: green;
}
body {
margin: 0;
}
#description {
position: absolute;
top: 300px;
}
</style>
<div id="foreground"></div>
<div id="description">
Tests paint invalidation on end of opacity transition.<br>
Passes if there is a green square and no red.<br>
</div>