Error "Uncaught SyntaxError: Unexpected identifier 'on' "

![image](https://user-images.githubusercontent.com/109625733/225020414-3b20fdf0-327e-4e3c-824e-eb294eeb005d.png)
![image](https://user-images.githubusercontent.com/109625733/225020544-887c7dab-0d47-4aac-aca4-fa25f1ac4df7.png)
![image](https://user-images.githubusercontent.com/109625733/225020853-8825c675-8008-468b-9fec-c8a080e30951.png)


Can you help me?
