chromium/third_party/blink/web_tests/fast/backgrounds/background-clip-text.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html lang="en">
<head>
  <title>Text clip</title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  
  <style type="text/css">

    div {
      width: 500px;
      height: 200px;
      font-size: 64px;
      background: red;
      border: 1px solid black;
      -webkit-background-clip: text;
      color: green;
    }
  </style>
</head>
<body>
<p><a href="https://bugs.webkit.org/show_bug.cgi?id=25829">https://bugs.webkit.org/show_bug.cgi?id=25829</a><br>
  You should see no areas of read below. (This paragraph is required for the test to be valid.)
</p>
<div>This background clips to the text.</div>
</body>

</html>