I've only played with Backbone a little, but I was under the impression that one thing Ember and Knockout offered over Backbone was the built-in automatic bindi

I've only played with Backbone a little, but I was under the impression that one thing Ember and Knockout offered over Backbone was the built-in automatic binding to perform UI updates, which required a bit of custom code (albeit pretty short) to update the views. Or did I miss something in Backbone?