v4: Specify how the validation cases should be used

Created by: tordans

I don't understand the difference between danger and warning and the documentation gives no suggestions about when to use what.

The way I understand forms they have a default style and an error style. I do understand the success style for cases where you have inline validation. But what are the use cases or usage szenarios for danger and warning?

Suggestions:

• Add a sentence or two about when to use danger and when to use warning – the decision should not be a visual but a semantic one, so what is the semantic?
• Ideally: Link to some blog post or book that describes having those two cases as separate styles as a best practice from a user / usability point of few. My go to guy for web form best practices is LukeW. He wrote about best practices for inline validations http://alistapart.com/article/inline-validation-in-web-forms and he wrote a book an many presentations about form in general (http://static.lukew.com/webforms_lukew.pdf and http://www.lukew.com/resources/web_form_design.asp). Unfortunately for bootstrap, there is no indication that it even makes sense to have a warning and danger as two separate indicators. So maybe this is something that should be reduced to one in version 5?

This is the part I am referring to: http://v4-alpha.getbootstrap.com/components/forms/#validation

Validation Bootstrap includes validation styles for danger, warning, and success states on form controls. To use, add .has-warning, .has-danger, or .has-success to the parent element. Any .form-control-label, .form-control, and .text-help within that element will receive the validation styles.