Update WheelPicker.tsx

Author: alexkendall

src/WheelPicker.tsx

@@ -95,8 +95,11 @@ const WheelPicker: React.FC<Props> = ({
     });
   }, [selectedIndex]);
 
+
   useEffect(() => {
-    //onChange(scrollIndex)
+    if (onChange) {
+      onChange(scrollIndex)
+    }
   }, [scrollIndex])
 
   const handleScroll = (event: {