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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS transforms: Transformed elements with overflow: hidden create scrolling areas for fixed descendants</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-transforms-1/#transform-rendering">
<link rel="help" href="https://drafts.csswg.org/css-transforms-1/#transform-property">
<link rel="match" href="transform-containing-block-and-scrolling-area-for-fixed-ref.html">
<meta name="assert" content="For elements whose layout is governed by the CSS box model, any value other than none for the transform results in the creation of both a stacking context and a containing block. The object acts as a containing block for fixed positioned descendants.">
<meta name="assert" content="The object acts as a containing block for fixed positioned descendants, but also creates scrolling areas for them."
<meta name="flags" content="dom">
<style>
html, body { margin: 0; padding: 0 }
#transformed {
transform: translateX(10px) translateY(10px);
width: 200px;
height: 200px;
background: grey;
overflow: hidden;
}
#fixed {
position: fixed;
width: 50px;
height: 50px;
top: 50px;
left: 50px;
background: green;
}
#spacer {
height: 10000px;
width: 10000px;
}
</style>
<body>
<div id="transformed">
<div id="fixed"></div>
<div id="spacer"></div>
</div>
<script>
document.getElementById('transformed').scrollTo(50, 50);
</script>
</body>
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