How to get which specific attribute of model has been changed? Is this possible in Backbone.js?

Question

So for example, I have a model with attributes: firstName, lastName, age, skills, race, birthdate, and about 20 more...

I want to get which specific attributes were changed (if user changes some) and do a .save() placing the specific attributes that were changed as arguments for .save({...})

Any way I can do this?

note: backbone.js newbie

Answer 1

见细骨干文档， http://documentcloud.github.com/backbone/#Model-change特别hasChanged和changedAttributes