wpt/css/css-contain/contain-paint-containing-block-absolute-001.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>CSS Test: 'contain: paint' element should contain absolute position elements.</title>
  <link rel="author" title="Kyle Zentner" href="mailto:zentner.kyle@gmail.com">
  <link rel="help" href="https://drafts.csswg.org/css-contain/#containment-paint">
  <link rel="match" href="contain-paint-containing-block-absolute-001-ref.html">
  <style>
  #a {
      contain: paint;
      width: 100px;
      height: 100px;
      background: red;
      margin: 50px;
  }
  #b {
      position: absolute;
      top: 0;
      left: 0;
      width: 100px;
      height: 100px;
      background: green;
  }
  </style>
</head>
<body>
  <div id="a">
    <div>
      <div id="b"></div>
    </div>
  </div>
</body>
</html>