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35 lines
972 B
HTML
35 lines
972 B
HTML
<!DOCTYPE html>
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<title>CSS Position Absolute: dynamic changes to containing block width</title>
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<link rel="author" href="mailto:atotic@google.com">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel="help" href="https://www.w3.org/TR/css-position-3/#abs-non-replaced-width">
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<meta name="assert" content="abspos descendant responds to containing block size change">
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<style>
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#container {
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position: relative;
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width: 50px;
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height: 100px;
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background: red;
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}
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#target {
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position: absolute;
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left: 0;
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width: 100%;
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height: 100%;
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background: green;
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}
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</style>
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<div id="container">
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<div style="display:flex;">
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<div id="target"></div>
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</div>
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</div>
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<script>
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document.body.offsetTop;
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test(() => {
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document.getElementById("container").style.width = "100px";
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assert_equals(document.querySelector("#target").offsetWidth, 100);
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}, '#target used container width when computing size');
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</script>
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