<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS Masking: mask-image: multiple SVG masks</title> <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com"> <link rel="author" title="Mozilla" href="https://www.mozilla.org"> <svg height="0"> <mask id="mask" x="0" y="0" width="1" height="1"> <rect x="0" y="0" width="50" height="50" style="stroke:none; fill: #ffffff"/> <circle cx="50" cy="50" r="25" style="stroke:none; fill: #ffffff"/> </mask> </svg> <style type="text/css"> div { background-color: purple; mask: url(#mask); width: 100px; height: 100px; } </style> </head> <body> <div></div> </body> </html>