green-square-100-by-100-ref.html

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<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS will-change reference</title>

<link rel="author" title="L. David Baron" href="https://dbaron.org/">

<link rel="author" title="Mozilla" href="http://www.mozilla.org/">

<style>

html, body { margin: 0; padding: 0; }

div { width: 100px; height: 100px; background: green }

</style>

<body>

  <div></div>

</body>