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3 ways to define a JavaScript class

3 ways to define a JavaScript class
Introduction JavaScript is a very flexible object-oriented language when it comes to syntax. In this article you can find three ways of defining and instantiating an object. Even if you have already picked your favorite way of doing it, it helps to know some alternatives in order to read other people's code. It's important to note that there are no classes in JavaScript. Functions can be used to somewhat simulate classes, but in general JavaScript is a class-less language. 1. This is probably one of the most common ways. function Apple (type) { this.type = type; this.color = "red"; this.getInfo = getAppleInfo; } function getAppleInfo() { return this.color + ' ' + this.type + ' apple'; } To instantiate an object using the Apple constructor function, set some properties and call methods you can do the following: var apple = new Apple('macintosh'); apple.color = "reddish"; alert(apple.getInfo()); 1.1. 1.2. Again, you can use the new objects exactly the same way as in 1. and 1.1. 2. 3. Summary

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Using Objects to Organize Your Code This is a reprint of an article that originally appeared in the March 2009 issue of JSMag. When you move beyond simple snippets of jQuery and start developing more complex user interactions, your code can quickly become unwieldy and difficult to debug. This article shows you how to start thinking about these interactions in terms of the bits of behavior the feature comprises, using the object literal pattern.

Developing Backbone.js Applications - By Addy Osmani (@addyosmani) Available free for open-source reading below or for purchase via the O'Reilly store. Pull requests and comments always welcome. Prelude Not so long ago, “data-rich web application” was an oxymoron. Today, these applications are everywhere and you need to know how to build them. Make OOP Classes in JavaScript Anyone who has tinkered with the Prototype model in JavaScript to produce classes as we know them in other languages has generally left web programming all together and taken up a career as a bus driver. There are a coterie of frameworks designed specifically to address this problem. But what if you’re not wild about frameworks, preferring instead to build tools specifically suited to your needs and style? For you, there is some black magic that can revolutionize the way you interact with the current JavaScript standard (someone please thaw me out when the 2.0 standard is implemented in June 2134, or whatever the projected date is). What you’ll need

dojo.setObject Set a property from a dot-separated string, such as “A.B.C”. In javascript, a dot separated string like obj.parent.child refers to an item called child inside an object called parent inside of obj. setObject will let you set the value of child, creating the intermediate parent object(s) if they don’t exist. Command Line API Reference The Command Line API is a collection of functions for performing common tasks with the Chrome Developer Tools. These include convenience functions for selecting and inspecting elements in the DOM, stopping and starting the profiler, and monitoring DOM events. This API complements the Console API, the Command Line API is only available from within the console itself.

Get Started With Prototype Much of the web counts on JavaScript for its interactivity and for many years it was difficult to write. Browser inconsistencies and complicated code made even advanced coders grimace. JavaScript frameworks, such as Prototype, jQuery and MooTools have taken much of the pain away. JavaScript Module Pattern: In-Depth The module pattern is a common JavaScript coding pattern. It’s generally well understood, but there are a number of advanced uses that have not gotten a lot of attention. In this article, I’ll review the basics and cover some truly remarkable advanced topics, including one which I think is original. The Basics We’ll start out with a simple overview of the module pattern, which has been well-known since Eric Miraglia (of YUI) first blogged about it three years ago. If you’re already familiar with the module pattern, feel free to skip ahead to “Advanced Patterns”.

“Andrew Burgees Writing Modular JavaScript” Tutorials - Tuts+ In this calligraphy course, you’ll learn the basic strokes that make up every letter in the Roundhand Script lower and uppercase alphabet. After you've practiced every letter, you'll then make a mock invitation. You’ll finish the course with a new appreciation for how easy calligraphy can be, and with the ability to create invitations, book plates, beautiful envelopes, and anything else you want to ink. Browser Detection » The MooTorial top Browser Detection Browser.js in Core includes a browser detection variables added to the Browser hash object. For the most part, MooTools smooths over the differences between browsers and you shouldn't find yourself needing to reference these variables very often. However, there are times when you need to know, and MooTools provides.