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Walmart used Backbone.js to create the new version of their mobile web application and created two new frameworks in the process. Thorax provides mixins, inheritable events, as well as model and collection view bindings that integrate directly with Handlebars templates. When returning a JSON response, send down the attributes of the model that have been changed by the server, and need to be updated on the client. When responding to a "read" request from a collection (Collection#fetch), send down an array of model attribute objects. Convenience to create a new instance of a model within a collection.

Equivalent to instantiating a model with a hash of attributes, saving the model to the server, and adding the model to the set after being successfully created. If client-side validation failed, the model will be unsaved, with validation errors. In order for this to work, you should set the model property of the collection.

The create method can accept either an attributes hash and options to be passed down during model instantiation or an existing, unsaved model object. Adding 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. Use reset to replace a collection with a new list of models , triggering a single "reset" event on completion, and without triggering any add or remove events on any models.

For convenience, within a "reset" event, the list of any previous models is available as options.previousModels. Hulu used Backbone.js to build its next generation online video experience. With Backbone as a foundation, the web interface was rewritten from scratch so that all page content can be loaded dynamically with smooth transitions as you navigate. New Rdio was developed from the ground up with a component based framework based on Backbone.js.

All of this relies on Backbone's views and models, and all URL routing is handled by Backbone's Router. When data changes are signaled in realtime, Backbone's Events notify the interested components in the data changes. Backbone forms the core of the new, dynamic, realtime Rdio web and desktop applications. Backbone views are almost more convention than they are code — they don't determine anything about your HTML or CSS for you, and can be used with any JavaScript templating library. The general idea is to organize your interface into logical views, backed by models, each of which can be updated independently when the model changes, without having to redraw the page. Add a model to the collection, firing an "add"event for each model, and an "update" event afterwards.

If a model property is defined, you may also pass raw attributes objects and options, and have them be vivified as instances of the model using the provided options. Pass to splice the model into the collection at the specified index. Before started jQuery, we need to download jQuery library file. Download latest version of jquery.js file from jquery.com Website.

CDNs can offer a performance benefit by hosting jQuery on servers spread across the global. Backbone.js now supports Zepto, alongside jQuery, as a framework for DOM manipulation and Ajax support. Implemented Model#escape, to efficiently handle attributes intended for HTML interpolation. When trying to persist a model, failed requests will now trigger an "error" event.

The ubiquitous options argument is now passed as the final argument to all "change" events. Fetch the default set of models for this collection from the server, setting them on the collection when they arrive. The options hash takes success and error callbacks which will both be passed as arguments.

When the model data returns from the server, it uses setto merge the fetched models, unless you pass , in which case the collection will be reset. Delegates to Backbone.syncunder the covers for custom persistence strategies and returns a jqXHR. The server handler for fetch requests should return a JSON array of models. By default save checks validate before setting any attributes but you may also tell set to validate the new attributes by passing as an option. With Backbone, you represent your data as Models, which can be created, validated, destroyed, and saved to the server.

Specifically, we had changed our internal data object to use Object.create instead of a plain object (). We did that to prevent collisions with keys on Object.prototype properties. However, this also meant that users could no longer check what was in jQuery data with the native .hasOwnProperty() method, and it broke some code. We've reverted that change, but plan to put it back in jQuery 4.0. Other changes include some minor updates to our docs and build system.

All "add" and "remove" events are now sent through the model, so that views can listen for them without having to know about the collection. ToJSON is no longer called at all for 'read' and 'delete' requests. Backbone routes are now able to load empty URL fragments. Cristi Balan and Irina Dumitrascu created Tzigla, a collaborative drawing application where artists make tiles that connect to each other to create surreal drawings. Backbone models help organize the code, routers provide bookmarkable deep links, and the views are rendered with haml.js and Zepto.

Tzigla is written in Ruby on the backend, and CoffeeScript on the frontend, with Jammitprepackaging the static assets. Trello is a collaboration tool that organizes your projects into boards. A Trello board holds many lists of cards, which can contain checklists, files and conversations, and may be voted on and organized with labels. The site was built ground up using Backbone.js for all the models, views, and routes. SoundCloud is the leading sound sharing platform on the internet, and Backbone.js provides the foundation for SoundCloud Mobile. The project uses the public SoundCloud APIas a data source , jQuery templatesfor the rendering, Qunit and PhantomJS for the testing suite.

The JS code, templates and CSS are built for the production deployment with various Node.js tools like ready.js, Jake, jsdom. The Backbone.History was modified to support the HTML5 history.pushState. Backbone.sync was extended with an additional SessionStorage based cache layer. Kinja is the platform behind Gawker, Gizmodo, Lifehacker, io9 and other Gawker Media blogs.

Backbone.js underlies the front-end application code that powers everything from user authentication to post authoring, commenting, and even serving ads. The JavaScript stack includes Underscore.js and jQuery, with some plugins, all loaded with RequireJS. Framework based Scala application and Backbone views, and the responsive layout is done with the Foundation framework using SASS. Perhaps the single most common JavaScript "gotcha" is the fact that when you pass a function as a callback, its value for this is lost. View events are automatically bound to the view's context for you.

You may also find it helpful to use _.bind and _.bindAllfrom Underscore.js. Because it serves as a foundation for your application, you're meant to extend and enhance it in the ways you see fit — the entire source code is annotated to make this easier for you. You'll find that there's very little there apart from core functions, and most of those can be overridden or augmented should you find the need. If you catch yourself adding methods to Backbone.Model.prototype, or creating your own base subclass, don't worry — that's how things are supposed to work. It's common to nest collections inside of models with Backbone.

For example, consider a Mailbox model that contains many Message models. One nice pattern for handling this is have a this.messages collection for each mailbox, enabling the lazy-loading of messages, when the mailbox is first opened ... Perhaps with MessageList views listening for "add" and "remove" events. Uses jQuery's on function to provide declarative callbacks for DOM events within a view. If an events hash is not passed directly, uses this.eventsas the source.

The callback may be either the name of a method on the view, or a direct function body. Omitting the selector causes the event to be bound to the view's root element (this.el). Parse is called by Backbone whenever a collection's models are returned by the server, in fetch. The function is passed the raw response object, and should return the array of model attributes to be addedto the collection. The default implementation is a no-op, simply passing through the JSON response. Override this if you need to work with a preexisting API, or better namespace your responses.

Each model can be a Model instance, an id string or a JS object, any value acceptable as the id argument of collection.get. Fires a "remove" event for each model, and a single "update" event afterwards, unless is passed. The model's index before removal is available to listeners as options.index. Override this property to specify the model class that the collection contains. If defined, you can pass raw attributes objects and options to add, create, and reset, and the attributes will be converted into a model of the proper type using the provided options, if any.

Save a model to your database , by delegating to Backbone.sync. Returns a jqXHR if validation is successful and false otherwise. The attributeshash should contain the attributes you'd like to change — keys that aren't mentioned won't be altered — but, a complete representation of the resource will be sent to the server. As with set, you may pass individual keys and values instead of a hash. If the model has a validatemethod, and validation fails, the model will not be saved.

If the model isNew, the save will be a "create", if the model already exists on the server, the save will be an "update" . A Model manages an internal table of data attributes, and triggers "change" events when any of its data is modified. Models handle syncing data with a persistence layer — usually a REST API with a backing database. Design your models as the atomic reusable objects containing all of the helpful functions for manipulating their particular bit of data.

Models should be able to be passed around throughout your app, and used anywhere that bit of data is needed. Backbone now has Controllers and History, for doing client-side routing based on URL fragments. Added emulateHTTP to provide support for legacy servers that don't do PUT and DELETE. Added emulateJSON for servers that can't accept application/jsonencoded requests.

Added Model#clear, which removes all attributes from a model. All Backbone classes may now be seamlessly inherited by CoffeeScript classes. A View's events property may now be defined as a function, as well as an object literal, making it easier to programmatically define and inherit events. GroupBy is now proxied from Underscore as a method on Collections.

If the server has already rendered everything on page load, pass Backbone.history.start() to prevent the initial route from triggering. ZocDoc helps patients find local, in-network doctors and dentists, see their real-time availability, and instantly book appointments. On the public side, the webapp uses Backbone.js to handle client-side state and rendering in search pagesand doctor profiles. In addition, the new version of the doctor-facing part of the website is a large single-page application that benefits from Backbone's structure and modularity.

ZocDoc's Backbone classes are tested with Jasmine, and delivered to the end user with Cassette. Backbone is agnostic as to whether you use Underscore templates, Mustache.js, direct DOM manipulation, server-side rendered snippets of HTML, or jQuery UI in your render function. Sometimes you'll have a view that renders thousands of models at once, in a tight loop.

Both can be appropriate in the same app, depending on the quantity of data involved, and the complexity of the UI. Merges the model's state with attributes fetched from the server by delegating to Backbone.sync. Useful if the model has never been populated with data, or if you'd like to ensure that you have the latest server state. Triggers a "change" event if the server's state differs from the current attributes. Fetch accepts success and error callbacks in the options hash, which are both passed as arguments.

It often renders the data from a specific model, or number of models — but views can also be data-less chunks of UI that stand alone. Instead, views listen to the model "change" events, and react or re-render themselves appropriately. New versions of jQuery can sometimes deprecate, or remove, old methods and functions. If a WordPress plugin on your website is using an older method, then this could potentially break things. Added options.changes to Collection "update" event which includes added, merged, and removed models. When Pandora redesigned their site in HTML5, they chose Backbone.js to help manage the user interface and interactions.

For example, there's a model that represents the "currently playing track", and multiple views that automatically update when the current track changes. The station list is a collection, so that when stations are added or changed, the UI stays up to date. Gilt Groupe uses Backbone.js to build multiple applications across their family of sites. Gilt's search functionality also uses Backbone to filter and sort products efficiently by moving those actions to the client-side. Raw access to the JavaScript array of models inside of the collection. Usually you'll want to use get, at, or the Underscore methodsto access model objects, but occasionally a direct reference to the array is desired.

Parse is called whenever a model's data is returned by the server, in fetch, and save. The function is passed the raw response object, and should return the attributes hash to be set on the model. Destroys the model on the server by delegating an HTTP DELETErequest to Backbone.sync. Accepts success and error callbacks in the options hash, which will be passed . Pass if you'd like to wait for the server to respond before removing the model from the collection.

The jquery-ui-apex[.min].css file loads by default and includes all the jQuery UI CSS files. If you had references to individual jQuery UI css files, you can remove them. Access to and manipulation of multiple DOM nodes in jQuery typically begins with calling the $ function with a CSS selector string. This returns a jQuery object referencing all the matching elements in the HTML page. $("div.test"), for example, returns a jQuery object with all the div elements of class test.

This node set can be manipulated by calling methods on the returned jQuery object. Jquery 3.5.1 CDN links including JS files with their minified versions. NPM or Yarn and Github installation guide for Jquery 3.5.1 or Download NPM or Yarn and Github source packages. Shortest CDN URLs and Minified versions helps to improve page speed and SEO.