Callback from reCaptcha when user is wrong

Does not exist.

Here you can see his documentation.

link

What I usually use is grecaptcha.getResponse to see if it has already been validated or not. If validated it returns the token that will be sent to the server. If you have not validated it is empty.

What would be the reason for this? It complements the question that I supplement the answer.

UPDATE:

According to the reasoning of the comment, I do not know a function of it for this, maybe a javascript catching the focus of some recaptcha id or class.

You can also try invisible :

I've used it a lot and the experience for the user is pretty cool.