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scroll-state-stuck-writing-direction.html
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<!DOCTYPE html>
<title>@container: scroll-state(stuck) matching writing-direction of query container</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#stuck">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-conditional/container-queries/support/cq-testcommon.js"></script>
<script src="/css/css-transitions/support/helper.js"></script>
<style>
#filler {
height: 10000px;
}
#stuck {
container-type: scroll-state;
position: sticky;
bottom: 0;
width: 100px;
height: 100px;
background: lime;
}
#target {
writing-mode: horizontal-tb;
direction: ltr;
width: 100px;
height: 100px;
background: orange;
}
@container scroll-state(stuck: inline-start) {
#target { --stuck: inline-start }
}
@container scroll-state(stuck: inline-end) {
#target { --stuck: inline-end }
}
@container scroll-state(stuck: block-start) {
#target { --stuck: block-start }
}
@container scroll-state(stuck: block-end) {
#target { --stuck: block-end }
}
</style>
<div id="filler"></div>
<div id="stuck">
<div id="target"></div>
</div>
<script>
setup(() => assert_implements_scroll_state_container_queries());
promise_test(async t => {
await waitForAnimationFrames(2);
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "block-end");
}, "bottom edge matching block-end for horizontal-tb/ltr");
promise_test(async t => {
stuck.style.writingMode = "vertical-lr";
stuck.style.direction = "ltr";
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "inline-end");
}, "bottom edge matching inline-end for vertical-lr/ltr");
promise_test(async t => {
stuck.style.writingMode = "vertical-rl";
stuck.style.direction = "ltr";
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "inline-end");
}, "bottom edge matching inline-end for vertical-rl/ltr");
promise_test(async t => {
stuck.style.writingMode = "vertical-lr";
stuck.style.direction = "rtl";
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "inline-start");
}, "bottom edge matching inline-start for vertical-lr/rtl");
promise_test(async t => {
stuck.style.writingMode = "vertical-rl";
stuck.style.direction = "rtl";
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "inline-start");
}, "bottom edge matching inline-start for vertical-rl/rtl");
promise_test(async t => {
stuck.style.writingMode = "horizontal-tb";
stuck.style.direction = "rtl";
assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "block-end");
}, "bottom edge matching block-end for horizontal-tb/rtl");
</script>