How can I add a bootstrap
btn-success class to the Drupal Commerce Checkout button in the cart form?
The Update cart button already has
btn-info but I can't find
btn-info anywhere in the code.
If would also like to adapt buttons in other parts as I expect
btn-success buttons to lead to higher conversion.
Bootstrap has great classes, I don't want to fiddle with CSS to try and recreate that, I just want to use the Bootstrap classes.
I'm okay with adding some PHP code to my theme's
_form_alter() and this is probably the way to do it. But how exactly?