Question 1

How do I display error messages with Twitter Bootstrap using Backbone.Validation?

Accepted Answer

The README references a gist for Bootstrap integration, but notes the default callbacks are basic. You typically need to override the 'valid' and 'invalid' callbacks to add Bootstrap classes like 'error' to form groups and render messages in '<p class="help-block">' elements.

Question 2

Can I use Backbone.Validation without jQuery?

Accepted Answer

Yes, but the default callbacks rely on jQuery for DOM manipulation. You can override these callbacks globally or per view to use plain JavaScript or other libraries, as shown in the configuration section.

Question 3

Backbone.Validation vs writing my own validate method in Backbone?

Accepted Answer

Backbone.Validation provides a declarative, structured approach with built-in validators and form binding, reducing boilerplate code. However, for simple, one-off validation, a custom validate method might be lighter, but it lacks the extensibility and integration features.

Question 4

How to add a custom validator in Backbone.Validation?

Accepted Answer

Extend Backbone.Validation.validators with your own function that returns an error message if invalid. The README provides an example using _.extend to add validators like 'myValidator', and you can also override built-in ones.

Question 5

How to handle conditional validation with Backbone.Validation?

Accepted Answer

Use the 'required' validator as a function, as mentioned in the FAQ. For example, you can make an attribute required only if another attribute has a specific value, though other validators still apply regardless of conditions.

Question 6

Does Backbone.Validation work with Backbone.stickit?

Accepted Answer

Yes, the README includes an example using Backbone.stickit for model-view binding, and Backbone.Validation can integrate with it for form validation, though you need to handle the binding and callbacks appropriately.

Backbone.validation

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