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26 lines
1.2 KiB
HTML
26 lines
1.2 KiB
HTML
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<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS will-change: 'will-change: perspective' creates a containing block for fixed positioned elements</title>
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<link rel="author" title="L. David Baron" href="http://dbaron.org/">
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<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
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<link rel="help" href="https://drafts.csswg.org/css-will-change-1/#will-change">
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<link rel="help" href="http://www.w3.org/TR/css3-transforms/#perspective-property">
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<link rel="match" href="green-square-100-by-100-offset-ref.html">
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<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.">
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<style>
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html, body { margin: 0; padding: 0; }
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div { width: 100px; height: 100px }
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#wc { will-change: perspective; margin: 100px 0 0 100px; background: red }
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.child { top: 0; left: 0; width: 50px; background: green }
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#fixpos { position: fixed }
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#abspos { position: absolute; left: 50px }
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</style>
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<body>
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<div id="wc">
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<div class="child" id="fixpos">
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</div>
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<div class="child" id="abspos">
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</div>
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</div>
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</body>
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