Is there a way to disable a button (e.g. next) if all form fields are not completed?

Hey all,

So I have a 3 step form, I’d like to disable the ‘next’ button on each step unless all form fields are completed.

I have validations on each form field so the form will not submit without these being completed, but due to the above there are occassions where they will not know a field from the first step is not completed as I haven’t figured out a way of stopping them progressing to the next stage.

Any ideas?