Question

Just playing around with WordPress / Contact Form 7.

Is it possible to add custom javascript function on successful email send event?

Answer 1

Write this in additional settings at the bottom of the contact form configuration page:

on_sent_ok: "some js code here"

UPDATE:
You can use it to call functions like this:

on_sent_ok: "your_function();"

Or write some code (this one redirects to thank you page):

on_sent_ok: "document.location='/thank-you-page/';"