text: <!DOCTYPE html>
  <html>
    <head>
      <meta charset="utf-8">
      <title>CSS Masking: mask-size: mask layer size</title>
      <link rel="author" title="Astley Chen" href="mailto:aschen@mozilla.com">
      <link rel="author" title="Mozilla" href="https://www.mozilla.org">
      <link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-size">
      <link rel="match" href="mask-size-auto-length-ref.html">
      <meta name="assert" content="Test checks whether sizing mask layer works correctly or not.">
      <style type="text/css">
        #outer {
          border: 1px solid black;
          width: 64px;
          height: 128px;
        }
  
        #inner {
          width: 64px;
          height: 128px;
          background-color: purple;
          mask-image: url(support/50x50-opaque-blue.svg);
          mask-repeat: no-repeat;
          mask-position: left top;
          mask-size: auto 15.625%;
        }
      </style>
    </head>
    <body>
      <div id="outer">
        <div id="inner"></div>
      </div>
    </body>
  </html>
  