74 lines
2.3 KiB
HTML
74 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title> CSS Scroll Snap 2 Test: scroll-initial-target*</title>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#scroll-initial-target">
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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="/dom/events/scrolling/scroll_support.js"></script>
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</head>
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<body>
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<style>
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#space {
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width: 1000px;
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height: 1000px;
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border: solid 1px red;
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}
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#scroller {
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width: 400px;
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height: 400px;
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overflow: hidden;
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border: solid 1px blue;
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position: absolute;
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}
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#target {
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width: 100px;
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height: 100px;
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background-color: pink;
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scroll-initial-target: nearest;
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position: absolute;
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top: 400px;
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left: 400px;
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}
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</style>
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<div id="scroller">
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<div id="space"></div>
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<div id="target"></div>
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</div>
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<script>
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promise_test(async (t) => {
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await waitForCompositorCommit();
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assert_equals(scroller.scrollTop, 400,
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"scroller is vertically scrolled to target");
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assert_equals(scroller.scrollLeft, 400,
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"scroller is horizontally scrolled to target");
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target.style.scrollSnapAlign = "center";
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await waitForCompositorCommit();
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assert_equals(scroller.scrollTop, 250,
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"scroller is vertically aligned to target's center");
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assert_equals(scroller.scrollLeft, 250,
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"scroller is horizontally aligned to target's center");
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target.style.scrollSnapAlign = "end";
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await waitForCompositorCommit();
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assert_equals(scroller.scrollTop, 100,
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"scroller is vertically aligned to target's bottom");
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assert_equals(scroller.scrollLeft, 100,
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"scroller is horizontally aligned to target's right");
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target.style.scrollSnapAlign = "start";
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await waitForCompositorCommit();
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assert_equals(scroller.scrollTop, 400,
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"scroller is vertically aligned to target's top");
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assert_equals(scroller.scrollLeft, 400,
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"scroller is horizontally aligned to target's left");
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}, "scroll-initial-target aligns with scroll-snap-align");
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</script>
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</body>
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</html>
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