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<!DOCTYPE html>
<title>@container: scroll-state(direction) multiple scrollers</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#direction">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<script src="/css/css-conditional/container-queries/support/cq-testcommon.js"></script>
<style>
.scroller {
width: 200px;
height: 200px;
container-type: scroll-state;
overflow-y: scroll;
}
.filler {
height: 600px;
}
.target {
--top1: no;
--top2: no;
--bottom1: no;
--bottom2: no;
}
#target1 {
@container scroll-state(direction: top) {
--top1: yes;
}
@container scroll-state(direction: bottom) {
--bottom1: yes;
}
}
#target2 {
@container scroll-state(direction: top) {
--top2: yes;
}
@container scroll-state(direction: bottom) {
--bottom2: yes;
}
}
</style>
<div id="scroller1" class="scroller">
<div class="filler">
<div id="target1" class="target"></div>
</div>
</div>
<div id="scroller2" class="scroller">
<div class="filler">
<div id="target2" class="target"></div>
</div>
</div>
<script>
setup(() => assert_implements_scroll_state_container_queries());
function touch_scroll(start_pos, end_pos) {
return new test_driver.Actions()
.addPointer("TestPointer", "touch")
.pointerMove(Math.round(start_pos.x), Math.round(start_pos.y))
.pointerDown()
.addTick()
.pause(200)
.pointerMove(Math.round(end_pos.x), Math.round(end_pos.y))
.addTick()
.pointerUp()
.send();
}
promise_test(async t => {
let scrollEndPromise1 = waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller1);
let scrollEndPromise2 = waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller2);
scroller1.addEventListener('scroll', () => {
scroller2.scrollTop = 300;
scroller2.scrollBy({top: -150, behavior: "smooth"});
}, { once: true });
// Scroll element position
const start = {
x: 100,
y: 100,
};
const end = { x: 100, y: 0 };
await touch_scroll(start, end);
await Promise.all([scrollEndPromise1, scrollEndPromise2]);
await waitForAnimationFrames(2);
assert_equals(getComputedStyle(target1).getPropertyValue("--top1"), "no");
assert_equals(getComputedStyle(target1).getPropertyValue("--bottom1"), "yes");
assert_equals(scroller2.scrollTop, 150);
assert_equals(getComputedStyle(target2).getPropertyValue("--top2"), "yes");
assert_equals(getComputedStyle(target2).getPropertyValue("--bottom2"), "no");
}, "User scroll caused programmatic relative scroll");
</script>
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