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Pretty much what is written in the title.
I want to do client side validation of forms in rails, so that whenever a user does not enter some “required” fields, it throws errors and do not submit the form at all (as opposed to doing that on the server side and redirect_to :back).
Any examples on how to do that?
Take a look
http://railscasts.com/episodes/263-client-side-validations
Showing validation errors inline as the user is filling out the form can lead to a better use experience. Learn how to do this using the Client Side Validations gem.