Custom classes

Adds or removes classes from form elements based on the URL or route name or Form ID. For example if a module doesn't define a unique class for a button, you can add one with this module. You don't have to create a form alter hook for it.

You can also remove any classes that are added via other modules. But be aware as this can result in AJAX errors on forms where a certain button is missing a required class. (For example if you remove the success class from the commerce Add to cart button, it could result to LogicException: The database connection is not serializable errors). So form item class removal should be your last resort during styling.