<!doctype html>
<style>
* {
margin: 0;
}
html {
background: white;
width: 200px;
height: 200px;
position: relative;
z-index: -1;
}
.compDesc {
will-change: transform;
position: absolute;
top: 0;
left: 50px;
width: 50px;
height: 100px;
background: green;
z-index: -2;
}
.desc {
width: 50px;
height: 100px;
background: green;
}
</style>
<div class="compDesc"></div>
<div class="desc"></div>