<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS Masking: mask-composite: compose SVG mask</title> <link rel="author" title="CJ Ku" href="mailto:cku@mozilla.com"> <link rel="author" title="Mozilla" href="https://www.mozilla.org"> <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-mask-composite"> <link rel="match" href="mask-composite-2-ref.html"> <meta name="assert" content="Test checks that svg-mask can be composed correctly by different mask-composite value."> <svg height="0"> <mask id="rectMask1" x="0" y="0" width="100" height="100" > <rect x="0" y="50" width="100" height="50" style="stroke:none; fill: #ffffff"/> </mask> <mask id="rectMask2" x="0" y="0" width="100" height="100" > <rect x="0" y="0" width="100" height="50" style="stroke:none; fill: #ffffff"/> </mask> </svg> <style type="text/css"> div { background-color: blue; position: absolute; margin: 0px; padding: 0px; width: 100px; height: 100px; top:10px; mask-image: url(#rectMask1), url(#rectMask2); } div.add { left: 10px; mask-composite: add; } div.subtract { left: 120px; mask-composite: subtract; } div.intersect { left: 230px; mask-composite: intersect; } div.exclude { left: 340px; mask-composite: exclude; } </style> </head> <body> <div class="add"></div> <div class="subtract"></div> <div class="intersect"></div> <div class="exclude"></div> </body> </html>