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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html b/testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html new file mode 100644 index 0000000000..7a9cf09faa --- /dev/null +++ b/testing/web-platform/tests/css/css-position/sticky/position-sticky-margins.html @@ -0,0 +1,49 @@ +<!DOCTYPE html> +<title>position:sticky elements should properly interact with margins</title> +<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> +<meta name="assert" content="position:sticky elements should ignore margins when sticking, but consider them when making sure sticky elements do not escape their containing block" /> + +<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 = setupStickyTest('top', 50); + elements.sticky.style.margin = '15px'; + elements.scroller.scrollTop = 100; + assert_equals(elements.sticky.offsetTop, + elements.container.offsetTop + elements.filler.clientHeight + 15); +}, 'Before sticking, the margin should be obeyed.'); + +test(() => { + const elements = setupStickyTest('top', 50); + elements.sticky.style.margin = '15px'; + + elements.scroller.scrollTop = 200; + + // This math cancels to sticky.offsetTop == (scroller.scrollTop + 50), but + // for clarity the calculations are left explicit. + const nonStickyTopY = elements.container.offsetTop + + elements.filler.clientHeight; + const targetTopY = elements.scroller.scrollTop + 50; + const stickyOffset = targetTopY - nonStickyTopY; + + assert_equals(elements.sticky.offsetTop, nonStickyTopY + stickyOffset); +}, 'Whilst stuck, the margin is irrelevant.'); + +test(() => { + const elements = setupStickyTest('top', 50); + elements.sticky.style.margin = '15px'; + + elements.scroller.scrollTop = 300; + + const maxOffsetInContainer = elements.container.offsetTop + + elements.container.clientHeight - elements.sticky.clientHeight; + assert_equals(elements.sticky.offsetTop, maxOffsetInContainer - 15); +}, 'The margin is taken into account when making sure the sticky element ' + + 'does not escape its container'); +</script> |