但是你可以用元编程来做到这一点

class Backbone.FlexRouter extends Backbone.Router
  route: (route,name,handler) ->
    super route,->
      @trigger "route:before"
      handler()
      @trigger "route:after"

UPD：我相信JS应该是这样的(但我没有测试它)

var rp = Backbone.Router.prototype
rp.routeWithoutEvents = rp.route
rp.route = function(route,handler){
  var that = this
  this.routeWithoutEvents(route,function(){
    that.trigger("route:before")
    handler()
    that.trigger("route:after")
  })
}