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56 lines
1.4 KiB
HTML
56 lines
1.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#invoke-a-layout-callback">
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<meta name="assert" content="This test checks running the microtask queue for a layout() class won't run the main world's microtask queue." />
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<style>
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#test {
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display: layout(child-layout);
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width: 100px;
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}
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#test > div {
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height: 100px;
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}
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</style>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/worklet-reftest.js"></script>
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<div id="test">
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<div></div>
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</div>
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<script id="code" type="text/worklet">
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registerLayout('child-layout', class {
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async intrinsicSizes() {}
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async layout([child]) {
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const fragment = await child.layoutNextFragment();
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return {autoBlockSize: 50, childFragments: [fragment]};
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}
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});
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</script>
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<script>
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promise_test(async t => {
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if (typeof CSS.layoutWorklet === 'undefined') {
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throw Error('CSS Layout API not supported.');
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}
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await importWorklet(CSS.layoutWorklet, document.getElementById('code').textContent);
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let resolved = false;
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let p = Promise.resolve().then(() => {
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resolved = true;
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});
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assert_false(resolved);
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// Running the layout-worklet's microtask queue shouldn't trigger the main
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// world's microtask queue.
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assert_equals(document.getElementById('test').clientHeight, 50);
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assert_false(resolved);
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await p;
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assert_true(resolved);
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});
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</script>
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</html>
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