Popup After Successful Registration

Hi!

Just wanted to confirm, I saw this javascript event being triggered in the code:
“user_registration_frontend_after_ajax_complete”

Is that the event I can use if I wanted to, say, execute a function that displays a popup?

I wanted to display a popup after a user successfully registers, or at least when the “User registered. Wait until admin approves your registration.” message appears.

If that’s the right event, can you provide a sample code I can start with?

Thank you so much!