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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS will-change: 'will-change: transform' creates a containing block for fixed positioned elements</title>
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+<link rel="help" href="https://drafts.csswg.org/css-will-change-1/#will-change">
+<link rel="help" href="http://www.w3.org/TR/css3-transforms/#transform-property">
+<link rel="match" href="green-square-100-by-100-offset-ref.html">
+<meta name="assert" content="If any non-initial value of a property would cause the element to generate a containing block for fixed-position elements, specifying that property in will-change must cause the element to generate a containing block for fixed-position elements.">
+<style>
+html, body { margin: 0; padding: 0; }
+div { width: 100px; height: 100px }
+#wc { will-change: transform; margin: 100px 0 0 100px; background: red }
+.child { top: 0; left: 0; width: 50px; background: green }
+#fixpos { position: fixed }
+#abspos { position: absolute; left: 50px }
+</style>
+<body>
+ <div id="wc">
+ <div class="child" id="fixpos">
+ </div>
+ <div class="child" id="abspos">
+ </div>
+ </div>
+</body>