File: sticky-position.html

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<!DOCTYPE html>
<html>
<head>
  <style>
    html, body {
      margin: 0;
    }
    .sticky {
      position: sticky;
      width: 10px;
      height: 10px;
    }
    .top {
      top: 1px;
    }
    .bottom {
      bottom: 1px;
    }
    .left {
      left: 1px;
    }
    .right {
      right: 1px;
    }
    .container {
      position: absolute;
      top: 100px;
      left: 100px;
      width: 200px;
      height: 200px;
    }
    .composited {
      will-change: transform;
    }
    .spacer {
        height: 10px;
    }
  </style>
</head>

<!-- Fixed position elements may skip compositing without a scrollable
ancestor. To make sure this test covers the intended scenario, we force the
body element to be tall, so that the FrameView is scrolling. -->
<body style="height: 4000px">
  <div class="container">
    <div id="div-tl" class="sticky top left">X</div>
    <div id="div-tr" class="sticky top right">X</div>
    <div id="div-bl" class="sticky bottom left">X</div>
    <div id="div-br" class="sticky bottom right">X</div>
    <span id="span-tl" class="sticky top left">X</span>
    <span id="span-tlbr" class="sticky top left bottom right">X</span>
  </div>
  <div class="composited container">
    <div class="spacer"></div>
    <div id="composited-top" class="sticky top">X</div>
  </div>
</body>
</html>