32 lines
1.2 KiB
HTML
32 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS Scoping: Dynamic shadow root creation and whitespace optimization crash.</title>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="help" href="https://drafts.csswg.org/css-scoping/#selectors-data-model">
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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1465572">
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<link rel="match" href="reference/green-box.html"/>
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<p>Test passes if you see a single 100px by 100px green box below.</p>
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<!--
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It's important for the test-case that there's whitespace inside the host,
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and that it's not assigned to any slot.
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-->
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<div id="host">
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<div style="display: inline" slot="the-slot"></div>
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</div>
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<script>
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// Flush layout before creating a ShadowRoot, so that the whitespace ends up
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// suppressed.
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document.body.offsetTop;
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host.attachShadow({ mode: "open" }).innerHTML = `
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<style>
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::slotted(div) {
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width: 100px;
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height: 100px;
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background: green;
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}
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</style>
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<slot name="the-slot"></slot>
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`;
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document.body.offsetTop;
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host.firstElementChild.style.display = "block"; // or anything else that reframes the <div>.
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</script>
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