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Anchor: Update anchor-scroll-position-try-011.html to scroll more. #55256

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merged 1 commit into from
Oct 9, 2025
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Anchor: Update anchor-scroll-position-try-011.html to scroll more. #55256

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12 changes: 8 additions & 4 deletions css/css-anchor-position/anchor-scroll-position-try-011.html
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@
position-try-fallbacks: --pf1, --pf2, --pf3;
bottom: anchor(top);
left: anchor(right);
position-visibility: always;
}

@position-try --pf1 {
Expand Down Expand Up @@ -85,9 +86,12 @@
assert_fallback_position(anchored, anchor, 'left');
}, 'Should use the last fallback position initially');

const sw = scroller.scrollWidth;
const sh = scroller.scrollHeight;

promise_test(async () => {
// Scroll up to have enough space above the anchor, but not enough right.
scroller.scrollTop = -250;
scroller.scrollTop = -sh;
scroller.scrollLeft = 150;
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'top');
Expand All @@ -97,16 +101,16 @@
promise_test(async () => {
// Scroll right to have enough space right to the anchor, but not enough above.
scroller.scrollTop = -150;
scroller.scrollLeft = 250;
scroller.scrollLeft = sw;
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'bottom');
assert_fallback_position(anchored, anchor, 'right');
}, 'Should use the second fallback position with enough space right');

promise_test(async () => {
// Scroll up and right to have enough space on both axes.
scroller.scrollTop = -350;
scroller.scrollLeft = 250;
scroller.scrollTop = -sh;
scroller.scrollLeft = sw;
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'top');
assert_fallback_position(anchored, anchor, 'right');
Expand Down