diff options
| 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-scroll-anchoring/clamp-negative-overflow.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-scroll-anchoring/clamp-negative-overflow.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-scroll-anchoring/clamp-negative-overflow.html | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-scroll-anchoring/clamp-negative-overflow.html b/testing/web-platform/tests/css/css-scroll-anchoring/clamp-negative-overflow.html new file mode 100644 index 0000000000..4f0b5fe9a2 --- /dev/null +++ b/testing/web-platform/tests/css/css-scroll-anchoring/clamp-negative-overflow.html @@ -0,0 +1,61 @@ +<!DOCTYPE html> +<html> +<meta charset="utf-8"> +<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring-1/"> +<head> + <script src="/resources/testharness.js"></script> + <script src="/resources/testharnessreport.js"></script> + <style type="text/css"> + #scroller { + overflow: scroll; + width: 500px; + height: 500px; + } + #anchor { + position: relative; + width: 100px; + height: 100px; + margin-top: 100px; + margin-bottom: 1000px; + background-color: blue; + } + #positioned { + position: absolute; + width: 10px; + height: 10px; + top: -200px; + background-color: yellow; + } + </style> +</head> +<body> + <div id="scroller"> + <div id="anchor"> + <div id="positioned"> + </div> + </div> + </div> + <script type="text/javascript"> + test(() => { + let scroller = document.querySelector('#scroller'); + let positioned = document.querySelector('#positioned'); + + // Scroll down to select #anchor as an anchor node + scroller.scrollTop = 20; + + // Move #positioned downwards, which will move the unclamped scrollable + // overflow rect of #anchor downards as well + positioned.style.top = '-180px'; + // To trigger the bug that this regression tests in Gecko, we need + // to not take Gecko's relative positioning fast path. To do + // this, change the 'left' of #positioned from 'auto' to '0px'. + positioned.style.left = '0px'; + + // The implementation should clamp the scrollable overflow rect + // before the start-edge of the anchor node, and not apply an + // adjustment + assert_equals(scroller.scrollTop, 20); + }, 'scrollable overflow before the start-edge of the anchor node should be clamped'); + </script> +</body> +</html> |