Validate on form submit instead of input focus out

[liliangousiou]

Hello, I have used AvField for login validation.
There are some checks that it is ok for validation to be triggered on input focus out, but I would like to get the validation result on form submit and also to add an extra custom check from backend.
Is there any way to do this?

[FelipeFelizardo]

Is there any way to validade the form from a function?

[AbhaysinghBhosale]

Is there any for this this in existing library for this behaviour