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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /testing/web-platform/tests/css/css-scroll-anchoring/position-change-heuristic-in-nested-scroll-box.html
parentInitial commit. (diff)
downloadfirefox-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>
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diff --git a/testing/web-platform/tests/css/css-scroll-anchoring/position-change-heuristic-in-nested-scroll-box.html b/testing/web-platform/tests/css/css-scroll-anchoring/position-change-heuristic-in-nested-scroll-box.html
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+++ b/testing/web-platform/tests/css/css-scroll-anchoring/position-change-heuristic-in-nested-scroll-box.html
@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/#suppression-triggers">
+<style>
+#space {
+ height: 4000px;
+ overflow: hidden;
+}
+#header {
+ background-color: #F5B335;
+ height: 50px;
+ width: 100%;
+}
+#content {
+ background-color: #D3D3D3;
+ height: 400px;
+}
+.scroller {
+ overflow: scroll;
+ position: relative;
+ width: 600px;
+ height: 600px;
+}
+body {
+ overflow: hidden;
+}
+</style>
+<div id="maybeScroller">
+ <div id="space">
+ <div id="header"></div>
+ <div id="before"></div>
+ <div id="content"></div>
+ </div>
+</div>
+<script>
+
+// Tests that scroll anchoring is suppressed when an element in the scroller
+// changes its in-flow state.
+
+var scroller;
+
+function runCase(oldPos, newPos, expectSuppression, skipInverse) {
+ var header = document.querySelector("#header");
+ var before = document.querySelector("#before");
+
+ header.style.position = oldPos;
+ before.style.height = "0";
+ scroller.scrollTop = 200;
+
+ header.style.position = newPos;
+ before.style.height = "25px";
+
+ var expectedTop = expectSuppression ? 200 : 225;
+ assert_equals(scroller.scrollTop, expectedTop);
+
+ if (!skipInverse)
+ runCase(newPos, oldPos, expectSuppression, true);
+}
+
+test(() => {
+ scroller = document.scrollingElement;
+ document.querySelector("#maybeScroller").className = "";
+
+ runCase("static", "fixed", true);
+ runCase("static", "absolute", true);
+ runCase("static", "relative", false);
+ runCase("fixed", "absolute", false);
+ runCase("fixed", "relative", true);
+ runCase("absolute", "relative", true);
+}, "Position changes in document scroller.");
+
+test(() => {
+ scroller = document.querySelector("#maybeScroller");
+ scroller.className = "scroller";
+
+ runCase("static", "fixed", true);
+ runCase("static", "absolute", true);
+ runCase("static", "relative", false);
+ runCase("fixed", "absolute", false);
+ runCase("fixed", "relative", true);
+ runCase("absolute", "relative", true);
+}, "Position changes in scrollable <div>.");
+
+</script>