events: return currentTarget when dispatching

PR-URL: #54642
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Mattias Buelens <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Ethan Arrowood <[email protected]>
Reviewed-By: Chemi Atlow <[email protected]>
Reviewed-By: James M Snell <[email protected]>

lib/internal/event_target.js

@@ -200,7 +200,7 @@ class Event {
   get currentTarget() {
     if (!isEvent(this))
       throw new ERR_INVALID_THIS('Event');
-    return this[kTarget];
+    return this[kIsBeingDispatched] ? this[kTarget] : null;
   }
 
   /**