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diff --git a/testing/web-platform/tests/css/css-scroll-snap/snap-after-relayout/changing-scroll-snap-type-on-root-element.html b/testing/web-platform/tests/css/css-scroll-snap/snap-after-relayout/changing-scroll-snap-type-on-root-element.html
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+++ b/testing/web-platform/tests/css/css-scroll-snap/snap-after-relayout/changing-scroll-snap-type-on-root-element.html
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+<!DOCTYPE html>
+<html>
+<title>
+ Updating the scroll-snap-type of the root element should make it resnap accordingly.
+ This is another vairant of changing-scroll-snap-type.html for the root element.
+</title>
+<link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#re-snap" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+div {
+ position: absolute;
+ margin: 0;
+}
+
+html {
+ overflow: hidden;
+ scroll-snap-type: none;
+}
+
+#y-target {
+ width: 300px;
+ height: 300px;
+ top: 100px;
+ left: 0;
+ background-color: green;
+ scroll-snap-align: start none;
+}
+
+#x-target {
+ width: 300px;
+ height: 300px;
+ top: 0;
+ left: 100px;
+ background-color: red;
+ scroll-snap-align: none start;
+}
+
+.area {
+ width: 1000vw;
+ height: 1000vh;
+}
+</style>
+
+<div class="area"></div>
+<div id="x-target"></div>
+<div id="y-target"></div>
+
+<script>
+const x_target = document.getElementById("x_target");
+const y_target = document.getElementById("y_target");
+const scroller = document.documentElement;
+
+function cleanup() {
+ scroller.style.setProperty("scroll-snap-type", "none");
+}
+
+test(t => {
+ t.add_cleanup(cleanup);
+ scroller.scrollTo(0,0);
+ assert_equals(scroller.scrollTop, 0);
+ assert_equals(scroller.scrollLeft, 0);
+
+ scroller.style.setProperty("scroll-snap-type", "y mandatory");
+ assert_equals(scroller.scrollTop, 100);
+ assert_equals(scroller.scrollLeft, 0);
+}, "Changing the scroller's snap type to y should make it resnap on the y-axis.");
+
+test(t => {
+ t.add_cleanup(cleanup);
+ scroller.scrollTo(0,0);
+ assert_equals(scroller.scrollTop, 0);
+ assert_equals(scroller.scrollLeft, 0);
+
+ scroller.style.setProperty("scroll-snap-type", "x mandatory");
+ assert_equals(scroller.scrollLeft, 100);
+ assert_equals(scroller.scrollTop, 0);
+}, "Changing the scroller's snap type to x should make it resnap on the x-axis.");
+
+
+test(t => {
+ t.add_cleanup(cleanup);
+ scroller.scrollTo(0,0);
+ assert_equals(scroller.scrollTop, 0);
+ assert_equals(scroller.scrollLeft, 0);
+
+ scroller.style.setProperty("scroll-snap-type", "x mandatory");
+ assert_equals(scroller.scrollLeft, 100);
+ assert_equals(scroller.scrollTop, 0);
+
+ scroller.style.setProperty("scroll-snap-type", "y mandatory");
+ assert_equals(scroller.scrollTop, 100);
+}, "Changing the scroller's snap type axis should make it resnap.");
+</script>
+</html>