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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/layout-instability/content-visibility-auto-offscreen.html | |
| parent | Initial commit. (diff) | |
| download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.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/layout-instability/content-visibility-auto-offscreen.html')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/content-visibility-auto-offscreen.html | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/content-visibility-auto-offscreen.html b/testing/web-platform/tests/layout-instability/content-visibility-auto-offscreen.html new file mode 100644 index 0000000000..9e4361b38b --- /dev/null +++ b/testing/web-platform/tests/layout-instability/content-visibility-auto-offscreen.html @@ -0,0 +1,47 @@ +<!DOCTYPE html> +<title>Layout Instability: off-screen content-visibility:auto content</title> +<link rel="help" href="https://wicg.github.io/layout-instability/" /> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/util.js"></script> +<script> +// These scripts need to be before the contents because we need to ensure no +// layout shifts during page load. +promise_test(async () => { + const watcher = new ScoreWatcher; + + // Wait for the initial render to complete. + await waitForAnimationFrames(2); + + window.scrollTo(0, 100000 + 100); + await waitForAnimationFrames(2); + + assert_equals(watcher.score, 0); + + // This should report a layout shift as target is now visible. + target.style.top = '100100px'; + + await watcher.promise; + const expectedScore = computeExpectedScore(100 * 100, 100); + assert_equals(watcher.score, expectedScore); + + // No new layout shift should be reported when target is scrolled out of screeen. + window.scrollTo(0, 0); + await waitForAnimationFrames(2); + + assert_equals(watcher.score, expectedScore); +}, 'off-screen content-visibility:auto'); +</script> +<style> + .auto { + content-visibility: auto; + contain-intrinsic-size: 1px; + width: 100px; + } +</style> +<div class=auto> + <div style="width: 100px; height: 100px; background: blue"></div> +</div> +<div id="target" class=auto style="position: relative; top: 100000px"> + <div style="width: 100px; height: 100px; background: blue"></div> +</div>
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