65 lines
1.8 KiB
HTML
65 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-align">
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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/common.js"></script>
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<script src="/resources/testdriver.js"></script>
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<script src="/resources/testdriver-vendor.js"></script>
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<script src="/resources/testdriver-actions.js"></script>
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<script src="/dom/events/scrolling/scroll_support.js"></script>
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<style>
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.scroller {
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height: 150px;
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width: 300px;
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overflow: auto;
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position: relative;
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white-space: nowrap;
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scroll-snap-type: x mandatory;
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}
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.padding {
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padding: 0 200px;
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}
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.child {
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scroll-snap-align: center;
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display: inline-block;
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width: 201px;
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height: 100%;
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margin: 0 200px;
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background-color: blue;
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}
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</style>
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<div class="scroller" id="scroller1">
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<div class="padding">
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<div class="child"></div>
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<div class="child"></div>
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</div>
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</div>
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<div class="scroller" id="scroller2">
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<div class="padding">
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<div class="child"></div>
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<div class="child"></div>
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</div>
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</div>
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<script>
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promise_test(async () => {
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// Scroll to the second child.
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let scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller2);
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scroller2.scrollTo(scroller2.scrollWidth, 0);
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await scrollEndPromise;
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assert_greater_than(scroller2.scrollLeft, scroller1.scrollLeft);
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// Scroll back to the first child.
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scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller2);
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await keyPress(scroller2, "ArrowLeft");
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await scrollEndPromise;
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// After scrolling to snap to the same child, both scrollers should have the
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// same scroll position.
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assert_equals(scroller2.scrollLeft, scroller1.scrollLeft);
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}, "initial scroll snap matches scrolling scroll snap position.");
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</script>
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