77 lines
No EOL
2.1 KiB
HTML
77 lines
No EOL
2.1 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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overflow: scroll;
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height: 500px;
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width: 500px;
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background-color: blue;
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scroll-snap-type: y mandatory;
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position: absolute;
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}
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.snap_point {
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scroll-snap-align: start;
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width: 40%;
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position: relative;
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left: 30%;
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}
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.big {
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height: 1000%;
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background-color: pink;
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border: solid 1px red;
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}
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.small {
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height: 50%;
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background-color: purple;
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border: solid 1px black;
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}
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</style>
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<div id="scroller">
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<div class="big snap_point" id="big_snap_point"></div>
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<div class="small snap_point">
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<button id="scrollerButton">scrollerButton</button>
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</div>
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</div>
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<script>
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promise_test(async(t) => {
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const x = scroller.clientWidth / 2;
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const y = scroller.clientHeight / 2;
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// Scroll all the way down to the smaller snap area which doesn't cover
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// the snapport.
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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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scroller.scrollTop = scroller.scrollHeight;
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await scrollend_promise;
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// Scroll up with one press of the arrow-up button.
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scrollend_promise = new Promise((resolve) => {
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scroller.addEventListener("scrollend", resolve);
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});
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const arrowUp = '\uE013';
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await test_driver.send_keys(scrollerButton, arrowUp);
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await scrollend_promise;
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assert_equals(scroller.scrollTop, big_snap_point.offsetHeight - scroller.clientHeight,
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"scroller is snapped to the bottom of the larger snap area, not the top");
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});
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</script>
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</body>
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</html> |