<!DOCTYPE html>
<style>
#box {
width: 100px;
height: 100px;
background-color: #00ff00;
transform: translate(0, 100px);
opacity: 0.5;
will-change: transform; /* force compositing */
}
#covered {
width: 100px;
height: 100px;
background-color: #ff8080;
}
</style>
<div id="box"></div>
<div id="covered"></div>