<!DOCTYPE HTML>
<style>
.shadow-normal { box-shadow: black 5px -5px 0; }
.shadow-inset { box-shadow: black 5px 5px 0 inset; }
tr { background-color: blue; will-change: transform; }
td { width: 100px; height: 100px; background-color: rgba(255,0,0,0.5); }
table { border-spacing: 10px; }
</style>
<table>
<tr><td></td><td></td></tr>
<tr class="shadow-normal"><td></td><td></td></tr>
<tr class="shadow-inset"><td></td><td></td></tr>
</table>