testing/web-platform/tests/css/css-will-change/will-change-fixedpos-cb-001-ref.html


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<!doctype html>
<meta charset="utf-8">
<title>CSS Test Reference</title>
<style>
  div {
    border: 1px solid green;
    background: green;
    margin-top: 100px;
    width: 100px;
    height: 100px;
  }
</style>
<div></div>