42 lines
1.2 KiB
HTML
42 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<title>position:sticky should operate correctly for the root scroller</title>
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<link rel="help" href="https://drafts.csswg.org/css-position-3/#valdef-position-sticky">
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<link rel="help" href="https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior">
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<meta name="assert" content="This test checks that position:sticky elements work when using the root (document) scroller which has `scroll-behavior` property" />
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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="support/scroll-behavior.js"></script>
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<style>
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html {
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scroll-behavior: smooth;
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}
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body {
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/* Assumption: 3000px is taller than any user agents test window size. */
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height: 3000px;
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/* A property which propagates for <html>. */
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overflow-x: hidden;
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}
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#sticky {
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position: sticky;
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top: 50px;
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width: 200px;
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height: 200px;
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background-color: green;
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}
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</style>
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<div id="sticky">This is a sticky element!</div>
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<script>
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promise_test(async () => {
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window.scrollTo(0, 700);
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await waitForScrollEnd(document.scrollingElement);
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assert_equals(sticky.offsetTop, 700 + 50);
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}, 'Sticky elements work with the root (document) scroller');
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</script>
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