Apply suggestions from code review

Thanks for the suggestions!

Co-authored-by: Masen Furer <[email protected]>

Author: debangshu919

reflex/.templates/web/utils/helpers/paste.js

@@ -40,13 +40,15 @@ export default function usePasteHandler(target_ids, event_actions, on_paste) {
 
   useEffect(() => {
     onPasteRef.current = on_paste;
+  }, [on_paste])
+  useEffect(() => {
     eventActionsRef.current = event_actions;
-  });
+  }, [event_actions]);
 
   useEffect(() => {
     const handle_paste = (_ev) => {
-      eventActionsRef.current.preventDefault && _ev.preventDefault();
-      eventActionsRef.current.stopPropagation && _ev.stopPropagation();
+      eventActionsRef.current?.preventDefault && _ev.preventDefault();
+      eventActionsRef.current?.stopPropagation && _ev.stopPropagation();
       handle_paste_data(_ev.clipboardData).then(onPasteRef.current);
     };