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35 lines
1.1 KiB
HTML
35 lines
1.1 KiB
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>Tests that after making a button a containing block, dynamically-inserted abspos boxes still get positioned correctly</title>
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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1740439">
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<link rel="help" href="https://drafts.csswg.org/css-position/#abspos-insets">
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<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
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<link rel="author" href="https://mozilla.org" title="Mozilla">
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<link rel="match" href="containing-block-change-button-ref.html">
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<style>
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#button {
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width: 400px;
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height: 400px;
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margin: 100px;
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background-color: purple;
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border: 0;
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padding: 10px;
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}
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#button > div {
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position: absolute;
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width: 100px;
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height: 100px;
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background-color: green;
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/* Vertically centered to match in-flow button layout of the reference */
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top: 150px;
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left: 0;
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}
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</style>
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<button id="button"></button>
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<script>
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let button = document.getElementById("button");
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button.getBoundingClientRect();
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button.style.position = "relative";
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button.getBoundingClientRect();
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button.appendChild(document.createElement("div"));
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</script>
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