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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-overflow/overflow-clip-margin-intersection-observer.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-overflow/overflow-clip-margin-intersection-observer.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-overflow/overflow-clip-margin-intersection-observer.html | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-overflow/overflow-clip-margin-intersection-observer.html b/testing/web-platform/tests/css/css-overflow/overflow-clip-margin-intersection-observer.html new file mode 100644 index 0000000000..dcc1e6e7ed --- /dev/null +++ b/testing/web-platform/tests/css/css-overflow/overflow-clip-margin-intersection-observer.html @@ -0,0 +1,55 @@ +<!doctype html> +<meta charset="utf-8"> +<title>Overflow: intersection observer with overflow-clip-margin</title> +<link rel="help" href="https://www.w3.org/TR/css-overflow-3/#propdef-overflow-clip-margin"> +<link rel="author" title="Scott Violet" href="mailto:sky@chromium.org"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<style> + #clipped_container { + overflow: clip; + width: 100px; + height: 100px; + border: solid; + overflow-clip-margin: 50px; + } + #big_green_div { + position: relative; + width: 1000px; + height: 1000px; + background: green; + left: -200px; + top: -200px; + } + /* These values ensure the element is vertically offscreen. */ + .spacer { width: 150px; height: calc(100vh + 10px); } +</style> +<div class="spacer"></div> +<div id="clipped_container"> + <div id="big_green_div"></div> +</div> + +<script> +let t = async_test("ParentWithOverflowClipMargin"); +let options = { + threshold: 0, + rootMargin: '0px' +} +// The 'big_green_div' is initially on screen due to +// overflow-clip-margin of the parent. Once the observer is notified, the +// overflow-clip-margin is reduced so that 'big_green_div' is no longer +// on screen, and the observer should again be notified. +let gotIntersects = false; +let intersectionObserver = new IntersectionObserver((entries, observer) => { + t.step(function() { assert_equals(1, entries.length); }); + let entry = entries[0]; + if (!gotIntersects) { + t.step(function() { assert_true(entry.isIntersecting); }); + gotIntersects = true; + document.getElementById('clipped_container').style.overflowClipMargin = "0px"; + } else { + t.step(function() { assert_false(entry.isIntersecting); }); + t.done(); + }}, options); +intersectionObserver.observe(document.getElementById('big_green_div')); +</script> |