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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /testing/web-platform/tests/layout-instability/translate-change.html
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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diff --git a/testing/web-platform/tests/layout-instability/translate-change.html b/testing/web-platform/tests/layout-instability/translate-change.html
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+<!DOCTYPE html>
+<title>Layout Instability: no layout shift for change of individual transform property</title>
+<link rel="help" href="https://wicg.github.io/layout-instability/" />
+<style>
+body { margin: 0; }
+#transformed { position: relative; translate: 20px 0; width: 100px; height: 100px; background: blue; }
+#child { width: 400px; height: 400px; }
+</style>
+<div id="transformed">
+ <div id="child"></div>
+</div>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/util.js"></script>
+<script>
+
+promise_test(async () => {
+ const watcher = new ScoreWatcher;
+
+ // Wait for the initial render to complete.
+ await waitForAnimationFrames(2);
+
+ // Modify the transform, for which no shift should be reported.
+ document.querySelector("#transformed").style = "translate: 0 100px";
+ // Change size of child, for which no shift should be reported, either.
+ document.querySelector("#child").style = "width: 300px";
+
+ await waitForAnimationFrames(2);
+ // No shift should be reported.
+ assert_equals(watcher.score, 0);
+}, 'no layout shift for transform change');
+
+</script>