commit 9f6e3ebec2184e0c46489bd01bcfe2d3ef8bc0ef
parent a83f498f9ae6df160908d28b71544f564afb0395
Author: David Awogbemila <awogbemila@chromium.org>
Date: Tue, 16 Dec 2025 08:45:36 +0000
Bug 2005499 [wpt PR 56682] - [animation-trigger] Add ancestor-chain tree-order test, a=testonly
Automatic update from web-platform-tests
[animation-trigger] Add ancestor-chain tree-order test
Among triggers with the same name within the same scope, preference
should be given to the trigger whose originating element is last in
tree order.
Bug: 390314945, 466134208
Change-Id: I4e492c1fff02d24fa979efc64292f58bb98ac3e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7242285
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Reviewed-by: David Awogbemila <awogbemila@chromium.org>
Commit-Queue: David Awogbemila <awogbemila@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1557346}
--
wpt-commits: c319db979d57529325590962a3764aa5ec4d82a6
wpt-pr: 56682
Diffstat:
1 file changed, 106 insertions(+), 0 deletions(-)
diff --git a/testing/web-platform/tests/scroll-animations/animation-trigger/trigger-scope-tree-order-ancestor-chain.tentative.html b/testing/web-platform/tests/scroll-animations/animation-trigger/trigger-scope-tree-order-ancestor-chain.tentative.html
@@ -0,0 +1,106 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <link rel="help" src="https://drafts.csswg.org/css-animations-2/#trigger-scope">
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+ <script src="/web-animations/testcommon.js"></script>
+ <script src="/dom/events/scrolling/scroll_support.js"></script>
+ <script src="support/support.js"></script>
+ <script src="support/trigger-scope-support.js"></script>
+ </head>
+ <body>
+ <style>
+ @keyframes expand {
+ from { transform: scaleX(1) }
+ to { transform: scaleX(2) }
+ }
+ #scroller {
+ overflow-y: scroll;
+ height: 200px;
+ width: 200px;
+ border: solid 1px;
+ trigger-scope: all;
+ display: block;
+ position: relative;
+ }
+ .source {
+ top: 100%;
+ height: 100px;
+ width: 100px;
+ background-color: blue;
+ timeline-trigger: --trigger view() contain;
+ color: white;
+ }
+ .target {
+ background-color: red;
+ height: 100px;
+ width: 100px;
+ animation: expand linear 1s both;
+ animation-trigger: --trigger play-forwards play-backwards;
+ position: sticky;
+ top: 0%;
+ left: 50%;
+ }
+
+ .long {
+ width: 50%;
+ height: 100%;
+ }
+ </style>
+ <div id="scroller">
+ <div id="target" class="target">Target</div>
+ <div class="long"></div>
+ <div id="source1" class="source">SOURCE 1
+ <div class="long"></div>
+ <div id="source2" class="source">SOURCE 2
+ <div class="long"></div>
+ <div id="source3" class="source">SOURCE 3
+ <div class="long"></div>
+ <div id="source4" class="source">SOURCE 4
+ <div class="long"></div>
+ <div id="source5" class="source">SOURCE 5</div>
+ <div class="long"></div>
+ </div>
+ </div>
+ </div>
+ </div>
+ </div>
+ <script>
+
+ promise_test(async() => {
+ await assert_playstate_and_current_time(target.id,
+ target.getAnimations()[0],
+ "paused");
+ let scrollend_promise;
+
+ // Sources 1 through 4 come earlier than source5 in tree-order so they
+ // should have no effect.
+ for (const source of [source1, source2, source3, source4]) {
+ scrollend_promise =
+ waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller);
+ source.scrollIntoView({block: "center"});
+ await scrollend_promise;
+ await waitForCompositorReady();
+ await assert_playstate_and_current_time(target.id,
+ target.getAnimations()[0],
+ "paused");
+ }
+
+ scrollend_promise =
+ waitForScrollEndFallbackToDelayWithoutScrollEvent(scroller);
+ source5.scrollIntoView({block: "center"});
+ await scrollend_promise;
+ await waitForCompositorReady();
+
+ await assert_greater_than(scroller.scrollTop, 0, "did scroll");
+ // The target should now be playing as its trigger condition has been
+ // met.
+ await assert_playstate_and_current_time(target.id,
+ target.getAnimations()[0],
+ "running");
+ }, "Among in-scope triggers with same name, last in tree-order is "+
+ "selected.");
+ </script>
+ </body>
+</html>
