mask-html-01.xhtml

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<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

-->

<html xmlns="http://www.w3.org/1999/xhtml"

      xmlns:svg="http://www.w3.org/2000/svg">

<body style="margin:0">

  <div style="mask: url(#m1); width:500px; height:500px; background:lime;"></div>

  <svg:svg height="0">

    <!-- so that other documents can svg:use this one and force it to

         load before onload -->

    <svg:g id="empty" />

    <svg:mask id="m1" maskUnits="objectBoundingBox" maskContentUnits="objectBoundingBox">

      <svg:linearGradient id="g" gradientUnits="objectBoundingBox" x2="0" y2="1">

        <svg:stop stop-color="white" offset="0"/>

        <svg:stop stop-color="white" stop-opacity="0" offset="1"/>

      </svg:linearGradient>

      <svg:circle cx="0.25" cy="0.25" r="0.25" id="circle" fill="white"/>

      <svg:rect x="0.5" y="0" width="0.5" height="1" fill="url(#g)"/>

    </svg:mask>

  </svg:svg>

</body>

</html>