#Backbone js each update#
#Backbone js each code#

Normally when using Backbone.js, you would have to implement your own timer and polling mechanism to check for changes on the server. Whilst this approach works the emphasis is very much on the client to manage state synchronisation, but what happens if something changes on the server? For example, if you’re building an application where two users can change the same thing at the same time? It provides you with all the essential components required for adding structure to your rich javascript-heavy applications, including a lightweight client to server synchronisation method which requires either jQuery or Zepto.js’s AJAX functionality.

#Backbone js each code#

Update: The code associated with this post has been updated to use Backbone.js 0.5.3 and Underscore.js 1.2.1 Backbone.jsīackbone.js is a framework from DocumentCloud, which is known for it’s excellent documentation. One such framework that has recently grown in popularity is Backbone.js. These frameworks often achieve this structure by adding in layers of Models, Controllers, Views, and Events, most of the time performing synchronisation between the client and server using AJAX. Mixin provides a way to enhance the base Backbone.Collection and any collections which extend it.Recently there have been a number of frameworks developed that allow you to add extra structure to your code when building rich javascript-heavy applications. Returns a new instance of the collection with an identical list of models.įetch the default set of models for this collection from the server, setting them on the collection when they arrive.Ĭonvenience to create a new instance of a model within a collection. Returns the collection’s data by passing through the response object and represents the data in JSON format. Set the url property (or function) on a collection to reference its location on the server. It returns the model, that matches the specified attribute in the collection. Return an array of all the models in a collection that match the passed attributes. Equivalent to calling mapĪnd returning a single attribute from the iterator. Pluck an attribute from each model in the collection. Sorts the items in the collection and uses comparator property in order to sort the items. It is used to sort the items in the collection. Property, counting the number of models it contains. Like an array, a Collection maintains a length Return a shallow copy of this collection’s models, using the same options as native Array#slice. Remove and return the first model from a collection.

Takes the same options as remove.Īdd a model at the beginning of a collection. Remove and return the last model from a collection. Retrieve the model from a collection by using specified index.Īdd a model at the end of a collection. It is used to retrieve the model from a collection by using the idor cid.

#Backbone js each update#

The set method performs a “smart” update of the collection with the passed list of models.

Remove a model (or an array of models) from the collection, and return them.Īdding and removing models one at a time is all well and good, but sometimes you have so many models to change that you’d rather just update the collection in bulk. It represents the state of the model and uses the Backbone.sync to display the state of the collection.Īdd a model (or an array of models) to the collection, firing an “add” Return an array containing the attributes hash of each model in the collection.Ĭollection.sync(method, collection, )

Raw access to the JavaScript array of models inside of the collection. When a model instance is created, it is invoked by defining the initialize function when the collection is created. If you define a preinitialize method, it will be invoked when the Collection is first created and before any instantiation logic is run for the Collection. New Backbone.Collection(, )įor use with collections as ES classes. Override this method to return the value the collection will use to identify a model given its attributes. To specify the model class, we need to override the model property of the collection class. (properties, )Įxtends the backbone’s collection class to create a collection.