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Introduction to Object-Oriented JavaScript

Introduction to Object-Oriented JavaScript
Object-oriented to the core, JavaScript features powerful, flexible OOP capabilities. This article starts with an introduction to object-oriented programming, then reviews the JavaScript object model, and finally demonstrates concepts of object-oriented programming in JavaScript. This article does not describe the newer syntax for object-oriented programming in ECMAScript 6. JavaScript review If you don't feel confident about JavaScript concepts such as variables, types, functions, and scope, you can read about those topics in A re-introduction to JavaScript. You can also consult the JavaScript Guide. Object-oriented programming Object-oriented programming (OOP) is a programming paradigm that uses abstraction to create models based on the real world. OOP envisions software as a collection of cooperating objects rather than a collection of functions or simply a list of commands (as is the traditional view). Terminology Namespace Class Defines the object's characteristics. Object Property Method

Using Prototypes in Javascript | As mentioned in my previous post, I think using prototypes is powerful enough to deserve a more detailed explanation. To start off, let me say we are talking about the prototype method here, not the JavaScript library. Prototypes allow you to easily define methods to all instances of a particular object. function Pet(name, species){ = name; this.species = species;}function view(){ return + " is a " + this.species + "!" As you can see, by using simply using prototype when we attached the view method, we have ensured that all Pet objects have access to the view method. function Pet(name, species){ = name; this.species = species;}function view(){ return + " is a " + this.species + "!" We set up the Dog object, and have it call the Pet function using the call() method. Moving on, we then give Dog a custom method called bark that only Dog objects have access to. It is important to understand that prototype follows a chain.

JS Objects: Inherited a Mess JS Objects: TL;DR JavaScript has been plagued since the beginning with misunderstanding and awkwardness around its "prototypal inheritance" system, mostly due to the fact that "inheritance" isn't how JS works at all, and trying to do that only leads to gotchas and confusions that we have to pave over with user-land helper libs. Instead, embracing that JS has "behavior delegation" (merely delegation links between objects) fits naturally with how JS syntax works, which creates more sensible code without the need of helpers. When you set aside distractions like mixins, polymorphism, composition, classes, constructors, and instances, and only focus on the objects that link to each other, you gain a powerful tool in behavior delegation that is easier to write, reason about, explain, and code-maintain. Simpler is better. JS is "objects-only" (OO). Due Thanks Complete Series As sad a criticism on JS as that quote is, it's quite true. It's quite possibly my "ah-ha!" OO in JavaScript Blueprint

JavaScript Object-Oriented Programming Part 1 This article was written in 2001 and still remains one of our most popular posts. If you’re keen to learn more about JavaScript, you may find this recent article on TypeScript of great interest. It may be shocking news, but JavaScript is a very powerful object-based (or prototype-based, whatever you wish to call it) language. First of all, JavaScript is not a full-blown OOP (Object-Oriented Programming) language, such as Java or PHP, but it is an object-based language. I hope that this article will turn an intermediate JavaScripter who’s itching to learn objects, into an expert, keen on the exciting object-oriented JavaScript world! In this tutorial, you’ll learn: JavaScript’s primitive data types What an object is in JavaScript How to create custom objects What a constructor is What an object’s prototype property is JavaScript’s Primitive Data Types JavaScript has five primitive data types: Undefined, Null, Boolean, Number, and String. var BooleanValue = true; var NumericalValue = 354; Typeof

5 Javascript Plugins to Create Page Scrolling Layout Page scrolling technique has been one of the famous layouts for single page websites. There are two types of page scrolling, one that uses browser’s scrollbar and another one scroll automatically via user action. In this post, we have found 5 javascript plugins that will help you  achieve page scrolling effect easily so you don’t have to reinvent the wheel again, just start designing your website and add the page effect. Scrollrama, BetterNikeWorld Parallax and Curtain use browser’s scrollbar to execute a serial of animations. For PageScroller and ScrollTo plugin, they scroll webpage or page inner content via user action (usually buttons, links, nav). Scrollrama Scrollrama uses the browser scrollbar to trigger a series of animation for different section of a website. About Kevin Kevin Liew is a web designer and developer and keen on contributing to the web development industry. A Showcase of Illustration in Logo Design 9 Elegant and Free Flat UI Kits 12 Graphic Design Paradoxes

Using Prototype Property in JavaScript Exclusive offer: get 50% off this eBook here Object-Oriented JavaScript — Save 50% Create scalable, reusable high-quality JavaScript applications and libraries by Stoyan Stefanov | August 2008 | AJAX Web Development In this article by Stoyan Stefanov, you'll learn about the prototype property of the function objects. The following topics are discussed in this article: Every function has a prototype property and it contains an objectAdding properties to the prototype objectUsing the properties added to the prototypeThe difference between own properties and properties of the prototype__proto__, the secret link every object keeps to its prototypeMethods such as isPrototypeOf(), hasOwnProperty(), and propertyIsEnumerable() The functions in JavaScript are objects and they contain methods and properties. If you define a simple function foo() you can access its properties as you would do with any other object: >>>function foo(a, b){return a * b;}>>>foo.length >>>foo.constructor Function() "object" "foo"

Capítulo 3. JavaScript avanzado (Introducción a AJAX) Al igual que sucede con otros lenguajes de programación, los objetos se emplean en JavaScript para organizar el código fuente de una forma más clara y para encapsular métodos y funciones comunes. La forma más sencilla de crear un objeto es mediante la palabra reservada new seguida del nombre de la clase que se quiere instanciar: var elObjeto = new Object();var laCadena = new String(); El objeto laCadena creado mediante el objeto nativo String permite almacenar una cadena de texto y aprovechar todas las herramientas y utilidades que proporciona JavaScript para su manejo. Por otra parte, la variable elObjeto almacena un objeto genérico de JavaScript, al que se pueden añadir propiedades y métodos propios para definir su comportamiento. 3.1.1. Técnicamente, un objeto de JavaScript es un array asociativo formado por las propiedades y los métodos del objeto. La forma tradicional de definir los arrays asociativos es mediante la clase Array: nombreArray.nombreClave = valor; Arrays

Object-oriented Programming ¶ In the early nineties, a thing called object-oriented programming stirred up the software industry. Most of the ideas behind it were not really new at the time, but they had finally gained enough momentum to start rolling, to become fashionable. Books were being written, courses given, programming languages developed. All of a sudden, everybody was extolling the virtues of object-orientation, enthusiastically applying it to every problem, convincing themselves they had finally found the right way to write programs. ¶ These things happen a lot. ¶ Few fads have managed to stay popular for as long as this one, though. ¶ As the name suggests, object-oriented programming is related to objects. ¶ The Date, Error, and BinaryHeap objects we have seen also work like this. ¶ One way to give an object methods is to simply attach function values to it. var rabbit = {}; rabbit.speak = function(line) { print("The rabbit says '", line, "'"); }; rabbit.speak("Well, now you're asking me

Touch And Mouse: Together Again For The First Time Introduction For close to thirty years, desktop computing experiences have centered around a keyboard and a mouse or trackpad as our main user input devices. Over the last decade, however, smartphones and tablets have brought a new interaction paradigm: touch. This article will help you understand how touch capabilities are built into the browser, how you can integrate this new interface mechanism into your existing apps and how touch can play nicely with mouse input. The State of Touch in the Web Platform The iPhone was the first popular platform to have dedicated touch APIs built in to the web browser. My colleague Boris Smus wrote a great HTML5Rocks tutorial on Touch events that is still a good way to get started if you haven’t looked at Touch events before. All done? Most Importantly: The User May Have Touch And a Mouse. Supporting Mouse and Touch Together #1 - Clicking and Tapping - the "Natural" Order of Things touchstart touchmove touchend mouseover mousemove mousedown mouseup click