Fix regression for handling `mouseenter`/`mouseleave` events introduced by #33310 (#33679)

* test: update spec for sibling adjacent mouseenter/mouseleave events

there is a regression introduced by #33310 - this would have catched that

* fix: fixup regression for mouseenter/mouseleave events introduced by #33310

the old logic only worked for parent-child movement since it checked for the relatedTarget to contain the delegateTarget - this should be fixed with this

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/js/src/dom/event-handler.js b/js/src/dom/event-handler.js
index 8ccb887fc3..3293f397d5 100644
--- a/js/src/dom/event-handler.js
+++ b/js/src/dom/event-handler.js
@@ -170,7 +170,7 @@ function addHandler(element, originalTypeEvent, handler, delegationFn, oneOff) {
   if (customEventsRegex.test(originalTypeEvent)) {
     const wrapFn = fn => {
       return function (event) {
-        if (!event.relatedTarget || (event.relatedTarget !== event.delegateTarget && event.relatedTarget.contains(event.delegateTarget))) {
+        if (!event.relatedTarget || (event.relatedTarget !== event.delegateTarget && !event.delegateTarget.contains(event.relatedTarget))) {
           return fn.call(this, event)
         }
       }