Add localProps to allow for true instance properties and ES6 classes

Author: Ben McCormick

backbone.js

@@ -394,6 +394,7 @@
   var Model = Backbone.Model = function(attributes, options) {
     var attrs = attributes || {};
     options || (options = {});
+    _.extend(this, _.result(this, 'localProps'));
     this.cid = _.uniqueId(this.cidPrefix);
     this.attributes = {};
     if (options.collection) this.collection = options.collection;
@@ -421,6 +422,11 @@
     // You may want to override this if you're experiencing name clashes with model ids.
     cidPrefix: 'c',
 
+    // localProps is an empty function by default. You can override it with a function
+    // or object.  The results of evaluating localProps will be mixed in to each instance
+    // of the Model
+    localProps: function(){},
+
     // Initialize is an empty function by default. Override it with your own
     // initialization logic.
     initialize: function(){},
@@ -753,6 +759,7 @@
   // its models in sort order, as they're added and removed.
   var Collection = Backbone.Collection = function(models, options) {
     options || (options = {});
+    _.extend(this, _.result(this, 'localProps'));
     if (options.model) this.model = options.model;
     if (options.comparator !== void 0) this.comparator = options.comparator;
     this._reset();
@@ -781,6 +788,12 @@
     // This should be overridden in most cases.
     model: Model,
 
+
+    // localProps is an empty function by default. You can override it with a function
+    // or object.  The results of evaluating localProps will be mixed in to each instance
+    // of the Collection
+    localProps: function(){},
+
     // Initialize is an empty function by default. Override it with your own
     // initialization logic.
     initialize: function(){},
@@ -1192,7 +1205,9 @@
   // Creating a Backbone.View creates its initial element outside of the DOM,
   // if an existing element is not provided...
   var View = Backbone.View = function(options) {
+
     this.cid = _.uniqueId('view');
+    _.extend(this, _.result(this, 'localProps'));
     _.extend(this, _.pick(options, viewOptions));
     this._ensureElement();
     this.initialize.apply(this, arguments);
@@ -1216,6 +1231,11 @@
       return this.$el.find(selector);
     },
 
+    // localProps is an empty function by default. You can override it with a function
+    // or object.  The results of evaluating localProps will be mixed in to each instance
+    // of the View
+    localProps: function(){},
+
     // Initialize is an empty function by default. Override it with your own
     // initialization logic.
     initialize: function(){},
@@ -1441,6 +1461,7 @@
   // matched. Creating a new one sets its `routes` hash, if not set statically.
   var Router = Backbone.Router = function(options) {
     options || (options = {});
+    _.extend(this, _.result(this, 'localProps'));
     if (options.routes) this.routes = options.routes;
     this._bindRoutes();
     this.initialize.apply(this, arguments);
@@ -1456,6 +1477,11 @@
   // Set up all inheritable **Backbone.Router** properties and methods.
   _.extend(Router.prototype, Events, {
 
+    // localProps is an empty function by default. You can override it with a function
+    // or object.  The results of evaluating localProps will be mixed in to each instance
+    // of the Router
+    localProps: function(){},
+
     // Initialize is an empty function by default. Override it with your own
     // initialization logic.
     initialize: function(){},