Formtastic in JavaScript (form builder)

Are you aware of any form builders that do similar job to Formtastic but in the browser?

It should not be very heavy (so not ExtJS) and ideally compatible with structure that Formtastic generates, jQuery based and HAML-JS friendly.

The purpose is to make it easier to create forms with SpineJS for Rails.

Under easier I mean:

• no need to add hidden fields to act as "unchecked";
• no need to repeat same structure all over again;
• no need to manually add classes to all the elements;
• produc开发者_StackOverflow中文版e inline-errors;
• etc;

Thanks.

This is for Backbone and not Spine, but it's pretty much what you want: https://github.com/powmedia/backbone-forms

Have you looked at using Jotform, or foxyform?