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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html b/testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html new file mode 100644 index 0000000000..58f41cc748 --- /dev/null +++ b/testing/web-platform/tests/css/css-scroll-anchoring/contain-paint-offscreen-container.html @@ -0,0 +1,42 @@ +<!DOCTYPE html> +<meta charset="utf8"> +<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org"> +<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/"> +<meta name="assert" content="ensures that scroll anchoring does not recurse into contained offscreen elements"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> + +<style> +body { height: 10000px; } +#container { contain: paint; } +#overflow { + position: relative; + top: 300px; + height: 10px; +} +#anchor { + width: 10px; + height: 50px; +} +</style> + +<div style="height: 800px"></div> +<div id="container" style="height: 40px"> + <div id=overflow></div> +</div> +<div id="changer" style="height: 150px"></div> +<div id=anchor></div> + +<script> +test(() => { + // Ensure #anchor is the only thing on screen. + // Note that #overflow would be on screen if container + // did not have layout and paint containment. + document.scrollingElement.scrollTop = 1000; + + // Ensure anchor doesn't move if #changer shrinks. + const offset = anchor.getBoundingClientRect().y; + document.querySelector("#changer").style.height = "50px"; + assert_equals(anchor.getBoundingClientRect().y, offset); +}, "Contain: style paint container offscreen."); +</script> |