50 lines
1.7 KiB
HTML
50 lines
1.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-type" />
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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="/resources/testdriver.js"></script>
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<script src="/resources/testdriver-actions.js"></script>
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<script src="/resources/testdriver-vendor.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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#scroller {
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width: 200px;
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height: 400px;
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overflow-y: scroll;
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scroll-snap-type: y mandatory;
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background-color: blue;
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}
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#snap_target {
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width: 100px;
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height: 1942.5px;
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scroll-snap-align: start;
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background-color: pink;
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}
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</style>
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<div id="scroller">
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<div id="snap_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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let scrollend_promise = new Promise((resolve) => {
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scroller.addEventListener("scrollend", resolve);
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});
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let scroll_promise = new Promise((resolve) => {
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scroller.addEventListener("scroll", resolve);
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});
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await new test_driver.Actions().scroll(0, 0, 0,
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scroller.scrollHeight, { origin: scroller }).send();
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await scroll_promise;
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await scrollend_promise;
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assert_approx_equals(scroller.scrollTop,
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scroller.scrollHeight - scroller.clientHeight, 1,
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"scroller is scrolled to its bottom and not its top.");
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}, "snapport covered by snap area doesn't jump");
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</script>
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</body>
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</html>
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