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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/adjustments-in-scroll-event-handler.tentative.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/adjustments-in-scroll-event-handler.tentative.html')
| -rw-r--r-- | testing/web-platform/tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html b/testing/web-platform/tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html new file mode 100644 index 0000000000..84fd79cbcb --- /dev/null +++ b/testing/web-platform/tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html @@ -0,0 +1,53 @@ +<!DOCTYPE html> +<meta name="viewport" content="width=device-width"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<link rel="author" title="Mozilla" href="https://mozilla.org"> +<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/"> +<style> + body { margin: 0 } + .content { + height: 200px; + background: lightblue; + } + .spacer { + height: 300vh; + } +</style> +<div class="content"></div> +<div class="content" style="background: green"></div> +<div class="spacer"></div> +<script> +const anchor = document.querySelectorAll(".content")[1]; + +const t = async_test("Scroll adjustments happen even if it's triggered from scroll event listeners"); +window.addEventListener("scroll", t.step_func(function() { + // Forcibly flush layout, this will flush the pending the node insertion. + let scrollPosition = window.scrollY; + + requestAnimationFrame(t.step_func(function() { + requestAnimationFrame(t.step_func(function() { + assert_equals(window.scrollY, 400); + t.done(); + })); + })); +}), { once: true }); + +window.onload = t.step_func(function() { + requestAnimationFrame(t.step_func(function() { + // Scroll to the anchor node in a requestAnimationFrame callback so that + // it queues a scroll event which will be fired in the next event loop. + anchor.scrollIntoView({ behavior: "instant" }); + + // Then in a setTimeout callback insert an element just right before the + // anchor node, it will run before firing the scroll event. + t.step_timeout(function() { + const content = document.createElement("div"); + content.classList.add("content"); + content.style.background = "red"; + anchor.before(content); + }, 0); + })); +}); + +</script> |