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96 lines
2.4 KiB
HTML
96 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#scroll-snap-stop" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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div {
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position: absolute;
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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: scroll;
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scroll-snap-type: both mandatory;
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}
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#space {
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left: 0px;
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top: 0px;
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width: 2100px;
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height: 2100px;
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}
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.target {
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width: 50px;
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height: 50px;
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scroll-snap-align: start;
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}
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.origin {
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left: 0px;
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top: 0px;
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}
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.always-stop {
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left: 100px;
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top: 0px;
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scroll-snap-stop: always;
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}
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.closer {
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left: 200px;
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top: 0px;
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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 class="target origin"></div>
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<div class="target always-stop"></div>
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<div class="target closer"></div>
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</div>
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<script>
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var scroller = document.getElementById("scroller");
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test(() => {
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scroller.scrollTo(0, 0);
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assert_equals(scroller.scrollLeft, 0);
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assert_equals(scroller.scrollTop, 0);
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scroller.scrollBy(300, 0);
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assert_equals(scroller.scrollLeft, 100);
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assert_equals(scroller.scrollTop, 0);
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}, "A scroll with intended direction and end position should not pass a snap " +
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"area with scroll-snap-stop: always.")
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test(() => {
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scroller.scrollTo(0, 0);
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assert_equals(scroller.scrollLeft, 0);
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assert_equals(scroller.scrollTop, 0);
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scroller.scrollTo(300, 0);
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assert_equals(scroller.scrollLeft, 200);
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assert_equals(scroller.scrollTop, 0);
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}, "A scroll with intended end position should always choose the closest snap " +
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"position regardless of the scroll-snap-stop value.")
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// Tests for programmatic scrolls beyond the scroller bounds.
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test(() => {
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scroller.scrollTo(0, 0);
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assert_equals(scroller.scrollLeft, 0);
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assert_equals(scroller.scrollTop, 0);
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scroller.scrollBy(100000, 0);
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assert_equals(scroller.scrollLeft, 100);
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assert_equals(scroller.scrollTop, 0);
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}, "A scroll outside bounds in the snapping axis with intended direction and " +
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"end position should not pass a snap area with scroll-snap-stop: always.")
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test(() => {
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scroller.scrollTo(0, 0);
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assert_equals(scroller.scrollLeft, 0);
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assert_equals(scroller.scrollTop, 0);
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scroller.scrollBy(300, -10);
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assert_equals(scroller.scrollLeft, 100);
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assert_equals(scroller.scrollTop, 0);
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}, "A scroll outside bounds in the non-snapping axis with intended direction " +
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"and end position should not pass a snap area with scroll-snap-stop: always.")
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</script>
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