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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html | |
| parent | Initial commit. (diff) | |
| download | firefox-upstream.tar.xz firefox-upstream.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html b/testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html new file mode 100644 index 0000000000..b92d45319b --- /dev/null +++ b/testing/web-platform/tests/css/css-position/sticky/position-sticky-nested-left.html @@ -0,0 +1,75 @@ +<!DOCTYPE html> +<title>Nested left-constrained position:sticky elements should render correctly</title> + +<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> +<meta name="assert" content="This test checks that nested position:sticky elements with a left constraint render correctly" /> + +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> + +<script src="../resources/sticky-util.js"></script> + +<body></body> + +<script> +test(() => { + const elements = setupNestedStickyTest('left', 50, 60); + elements.scroller.scrollLeft = 100; + const nonStickyLeftX = elements.container.offsetLeft + + elements.filler.clientWidth; + assert_equals(elements.sticky.offsetLeft, nonStickyLeftX); + // The inner sticky should not be offset from the outer. + assert_equals(elements.innerSticky.offsetLeft, 0); +}, 'before reaching the sticking point, neither sticky box should be offset'); + +test(() => { + const elements = setupNestedStickyTest('left', 50, 60); + elements.scroller.scrollLeft = 145; + const nonStickyLeftX = elements.container.offsetLeft + + elements.filler.clientWidth; + assert_equals(elements.sticky.offsetLeft, nonStickyLeftX); + assert_equals(elements.innerSticky.offsetLeft, 5); +}, 'the inner sticky can stick before the outer one if necessary'); + +test(() => { + const elements = setupNestedStickyTest('left', 50, 60); + elements.scroller.scrollLeft = 200; + + // This math cancels to sticky.offsetLeft == (scroller.scrollLeft + 50), but + // for clarity the calculations are left explicit. + const nonStickyLeftX = elements.container.offsetLeft + + elements.filler.clientWidth; + const targetLeftX = elements.scroller.scrollLeft + 50; + const stickyOffset = targetLeftX - nonStickyLeftX; + assert_equals(elements.sticky.offsetLeft, nonStickyLeftX + stickyOffset); + + // The inner sticky has similar math, but its offsetLeft is relative to the + // sticky element and in this test is the difference between the left values. + assert_equals(elements.innerSticky.offsetLeft, 10); +}, 'both sticky boxes can be stuck at the same time'); + +test(() => { + const elements = setupNestedStickyTest('left', 50, 60); + elements.scroller.scrollLeft = 300; + const maxOffsetInContainer = elements.container.offsetLeft + + elements.container.clientWidth - elements.sticky.clientWidth; + assert_equals(elements.sticky.offsetLeft, maxOffsetInContainer); + const maxOffsetInOuterSticky = elements.sticky.clientWidth - + elements.innerSticky.clientWidth; + assert_equals(elements.innerSticky.offsetLeft, maxOffsetInOuterSticky); +}, 'neither sticky can escape their containing block'); + +test(() => { + const elements = setupNestedStickyTest('left', 50, 300); + elements.scroller.scrollLeft = 100; + // The outer sticky has not stuck yet. + const nonStickyLeftX = elements.container.offsetLeft + + elements.filler.clientWidth; + assert_equals(elements.sticky.offsetLeft, nonStickyLeftX); + // But the inner sticky still cannot escape the outer sticky (as it is the + // containing block). + const maxOffsetInOuterSticky = elements.sticky.clientWidth - + elements.innerSticky.clientWidth; + assert_equals(elements.innerSticky.offsetLeft, maxOffsetInOuterSticky); +}, 'the inner sticky cannot be pushed outside the outer sticky'); +</script> |