Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/layout/style/test/mq_changes_child.html b/layout/style/test/mq_changes_child.html
new file mode 100644
index 0000000000..f594e9f00d
--- /dev/null
+++ b/layout/style/test/mq_changes_child.html
@@ -0,0 +1,8 @@
+<script>
+const mql = matchMedia("(prefers-reduced-motion: reduce)");
+mql.addEventListener("change", event => {
+  parent.postMessage({ "matches": event.matches }, "*");
+});
+
+window.onload = () => { parent.postMessage("ready", "*"); };
+</script>