MVC & backbone.js
Download as PPTX, PDF•1 like•3,982 views
The document discusses Model-View-Controller (MVC) architecture and Backbone.js. It defines MVC as separating a web application into three parts: the model (data), view (presentation), and controller (user interaction). It explains that Backbone.js implements an MVC-like structure using models, views, and routers to organize JavaScript code. The document also introduces JavaScript templating as a way to render templates with data bindings into the HTML DOM.
MVC & backbone.js
- 1. April 18 2012 MVC Mohammed Arif Manager Interactive Development @ SapientNitro & www.mohammedarif.com https://twitter.com/#!/arif_iq backbone.js http://in.linkedin.com/in/mohdarif
- 2. Agenda • What is MVC • Why MVC • MVC Advantages • What is backbone • Why backbone • What is JavaScript templating • Why JavaScript templating • Questions/Feedback
- 3. What is MVC… MVC stands for Model-View-Controller.
- 4. What is MVC… MVC is a Architectural Design Pattern
- 5. What is MVC… Separates a web application into three parts: the data (Model), the presentation of that data to the user (View), and the actions taken on any user interaction (Controller or routers).
- 6. What is MVC In the past it has been heavily used for structuring desktop and server-side applications, but it's only been in recent years that come to being applied to JavaScript. As the majority of JavaScript developers currently using these patterns opt to utilize libraries such as Backbone.js for implementing an MVC/MV*-like structure.
- 7. Design Pattern A pattern that has been developed to help programmers cope with common problems Blueprints on how to construct something
- 8. MVC - Model Data representation Can be database/xml/etc Business Logic
- 9. MVC - View Data presentation and user input Renders the Model in to a View Can be HTML/PDF/WML/Javascript No computations, very little logic, display logic i.e. loops
- 10. MVC - Controller Dispatches Requests and controls flow Centralizes access Interacts with Model and View
- 11. Why MVC If you do a lot of JavaScript, things tend to get messy! Backbone provides a way to organize your code, by using the MVC pattern Only the View accesses the DOM (e.g. with jQuery, Dojo,…)
- 12. MVC Advantages… Separation of interests Model centralizes business logic View centralizes display logic Controller centralizes application flow
- 13. MVC Advantages Clean separation of content/style Improved decoupling Easier testing Allow multiple people to work on different parts
- 14. What is backbone.js Backbone.js is one of a number of JavaScript frameworks for creating MVC- like web applications, it's relatively lightweight and can be easily tested using third-party toolkits such as Jasmine or QUnit. Or Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
- 15. Why backbone Organize the structure to your application Simplify server-side persistence Decouple the DOM from your page's data Model data, views and routers in a succinct manner Provide DOM, model and collection synchronization
- 16. Backbone.js - Model Models are the heart of any JavaScript application, containing the interactive data as well as a large part of the logic surrounding it: conversions, validations, computed properties, and access control.
- 17. Backbone.js - Model /*Let’s create a model*/ Person = Backbone.Model.extend({ initialize: function(){ alert("Hello Studio"); } }); var person = new Person; /*initialize() is triggered whenever you create a new instance of a model*/
- 18. Backbone.js - View Backbone views are used to reflect what your applications’ data models look like They are also used to listen to events and react accordingly
- 19. Backbone.js - View SearchView = Backbone.View.extend({ initialize: function(){ alert("Alerts suck."); } }); // The initialize function is always called when instantiating a Backbone View. // Consider it the constructor of the class. var search_view = new SearchView;
- 20. Backbone.js - Collection Backbone collections are simply an ordered set of models. var Song = Backbone.Model.extend({ initialize: function(){ console.log("Music is the answer"); } }); var Album = Backbone.Collection.extend({ model: Song });
- 21. What is JavaScript templating A template contains markup with binding expressions. The template is applied to data objects or arrays, and rendered into the HTML DOM.
- 22. Why JavaScript templating Loading all data from the server especially in rich list displays Adding or updating new items in lists Anywhere you need to add new complex content to the page Anything that requires client side HTML rendering