svg/css/path-with-shadow.svg

<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg">
<path mask="url(#mask)" fill="blue" d="M 200 200 l 100 0 l 0 200 l -100 0 Z" style="-webkit-svg-shadow: 5px 5px 5px grey"/>
</svg>