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Automatic update from web-platform-tests [ScrollSnap] Invalidate SnapContainer when applying transform to target This is a follow-up patch of crrev.com/c/1962567 to support transform inducing resnapping. Bug: 1028316 Change-Id: Ie1ae2f088919665c6ddfbf3d8a9dce119d066f8b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2008061 Reviewed-by: David Bokan <bokan@chromium.org> Commit-Queue: Yi Gu <yigu@chromium.org> Cr-Commit-Position: refs/heads/master@{#732965} -- wpt-commits: e2643469fd5a9c370f6d5df73f601a14b0abab1b wpt-pr: 21241
116 lines
3 KiB
HTML
116 lines
3 KiB
HTML
<!DOCTYPE html>
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<title>
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Moving the current snap target should make the scroller resnap to it.
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</title>
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<link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#re-snap" />
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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: relative;
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margin: 0;
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}
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#block {
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height: 100px;
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width: 100px;
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}
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#scroller {
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height: 500px;
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width: 500px;
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overflow: hidden;
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scroll-snap-type: both mandatory;
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}
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#initial-target {
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width: 300px;
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height: 300px;
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left: 100px;
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top: 0;
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transform: none;
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background-color: green;
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scroll-snap-align: start;
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}
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#other-target {
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width: 300px;
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height: 300px;
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left: 300px;
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background-color: red;
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scroll-snap-align: start;
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}
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.area {
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width: 2000px;
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height: 2000px;
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}
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</style>
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<div id="scroller">
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<div id="block"></div>
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<div id="initial-target"></div>
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<div id="other-target"></div>
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<div class="area"></div>
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</div>
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<script>
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const initial_target = document.getElementById("initial-target");
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const other_target = document.getElementById("other-target");
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const block = document.getElementById("block");
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const scroller = document.getElementById("scroller");
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function cleanup() {
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initial_target.style.setProperty("transform", "none");
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initial_target.style.setProperty("top", "0");
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block.style.setProperty("height", "100px");
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}
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test(t => {
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t.add_cleanup(cleanup);
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scroller.scrollTo(0,0);
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assert_equals(scroller.scrollTop, 100);
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assert_equals(scroller.scrollLeft, 100);
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initial_target.style.setProperty("top", "300px");
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assert_equals(scroller.scrollTop, 400);
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assert_equals(scroller.scrollLeft, 100);
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}, "Moving the current snap target should make the scroller resnap to it.");
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test(t => {
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t.add_cleanup(cleanup);
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scroller.scrollTo(0,0);
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assert_equals(scroller.scrollTop, 100);
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assert_equals(scroller.scrollLeft, 100);
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block.style.setProperty("height", "200px");
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assert_equals(scroller.scrollTop, 200);
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assert_equals(scroller.scrollLeft, 100);
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}, "Changing the layout of other elements should be able to cause resnapping to \
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the target.");
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test(t => {
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t.add_cleanup(cleanup);
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scroller.scrollTo(0,0);
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assert_equals(scroller.scrollTop, 100);
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assert_equals(scroller.scrollLeft, 100);
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initial_target.style.setProperty("transform", "translate(0,100px)");
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assert_equals(scroller.scrollTop, 200);
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assert_equals(scroller.scrollLeft, 100);
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}, "Transforming the current snap target should make the scroller resnap to it.");
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test(t => {
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t.add_cleanup(cleanup);
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initial_target.style.setProperty("top", "100px");
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scroller.scrollTo(0,0);
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assert_equals(scroller.scrollTop, 200);
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assert_equals(scroller.scrollLeft, 100);
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initial_target.style.setProperty("transform", "translate(0,100px)");
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initial_target.style.setProperty("top", "0");
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assert_equals(scroller.scrollTop, 200);
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assert_equals(scroller.scrollLeft, 100);
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}, "Applying two property changes that do not change the visual offset of the \
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target should not change the scroll offset.");
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</script>
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