css/css-masking/clip-path/clip-path-shape-004.html

<!DOCTYPE html>
<html>
<head>
  <title>CSS Masking: Test clip-path property and shape function with nonzero fill</title>
  <link rel="help" href="https://drafts.csswg.org/css-shapes-2/#funcdef-shape">
  <link rel="match" href="reference/clip-path-shape-004-ref.html">
  <meta name="assert" content="The clip-path property takes the basic shape
	'shape()' for clipping. Test arcs.">
</head>
<style>
  div {
    width: 100px;
    height: 100px;
  }
  #ref {
    clip-path: path(nonzero, "M 20 20 A 25 12 0 0 1 80 20, a 33 33 120 1 1 -40 50, A 20 25 0 0 0 20 20");
    background-color: red;
    position: absolute;
  }
  #rect {
    width: 100px;
    height: 100px;
    background-color: green;
    clip-path: shape(nonzero from 20px 20px,
                     arc to 80px 20px of 25px 12px cw,
                     arc by -40px 50px of 33px cw large rotate 120deg,
                     arc to 20% 20% of 20px 25px ccw);
  }
</style>
<body>
  <p>You should see no red.</p>
  <div id="ref"></div>
  <div id="rect"></div>
</body>
</html>