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If `will-change` is set to a property value where that property could create a stacking context, then we create a stacking context regardless of the current value of that property.
22 lines
1018 B
HTML
22 lines
1018 B
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS will-change: 'will-change: isolation' creates a stacking context</title>
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<link rel="author" title="L. David Baron" href="https://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/compositing-1/#isolation">
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<link rel="match" href="../../../../expected/wpt-import/css/css-will-change/green-square-100-by-100-ref.html">
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<meta name="assert" content="If any non-initial value of a property would create a stacking context on the element, specifying that property in will-change must create a stacking context on the element.">
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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: isolation; background: red }
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#child { position: absolute; top: 0; left: 0; z-index: -1; background: green }
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</style>
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<body>
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<div id="wc">
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<div id="child">
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</div>
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</div>
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</body>
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