<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Masking: mask-image: mask layer image</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-image">
    <link rel="match" href="mask-image-2-ref.html">
    <meta name="assert" content="Test checks whether gradient CSS image as mask layer works correctly or not.">
    <style type="text/css">
      div {
        background-color: purple;
        width: 100px;
        height: 100px;
      }

      div.mask-by-gradient-1 {
        mask-image: linear-gradient(rgba(0,0,255,0), rgba(0,0,255,1)); /* blue gradient mask */
      }

      div.mask-by-gradient-2 {
        mask-image: linear-gradient(rgba(255,0,0,0), rgba(255,0,0,1)); /* red gradient mask */
      }
    </style>
  </head>
  <body>
    <div class="mask-by-gradient-1"></div>
    <div class="mask-by-gradient-2"></div>
  </body>
</html>
