How to remove 'error' class from form field?

Question

I need to remove the error class from field after form submit. How to do that?

I found the function called _form_set_class but I suppose I can't overwrite it.

Answer 1

_form_set_class() is called from a bunch of different theme functions, including

• theme_checkbox()
• theme_fieldset()
• theme_file()

(the rest are here)

You can override whichever of those functions you need to in your theme by renaming the function as (e.g.)

function MYTHEME_checkbox($vars) {

Then copy in the original code from the function, remove the call to _form_get_class(), and replace it with whatever makes sense for your use case.