Behavior-registration for UJS with jQuery

behaviors.js

// An Unobtrusive Javascript (UJS) driver based on explicit behavior definitions. Just
// put a "data-behaviors" attribute on your view elements, and then assign callbacks
// for those named behaviors via $.Behaviors.add.

$.Behaviors = {
  add: function(trigger, behavior, handler) {
    $('[data-behaviors~=' + behavior + ']').live(trigger, handler);
  }
};

We're doing it live()
It doesn't make much sense to call it a behavior, and expect to call $.Behaviors.add(...) each time an element is added dynamically.