background preloader

Javascript style and stucture

Facebook Twitter

Introduction. Cookbook. Introduction Automated testing of software is an essential tool in development.

Cookbook

Unit tests are the basic building blocks for automated tests: each component, the unit, of software is accompanied by a test that can be run by a test runner over and over again without any human interaction. In other words, you can write a test once and run it as often as necessary without any additional cost. In addition to the benefits of good test coverage, testing can also drive the design of software, known as test-driven design, where a test is written before an implementation. You start writing a very simple test, verify that it fails (because the code to be tested doesn't exist yet), and then write the necessary implementation until the test passes.

JSbooks - free javascript books. Superhero.js. Introduction to Object-Oriented JavaScript. Object-oriented to the core, JavaScript features powerful, flexible OOP capabilities.

Introduction to Object-Oriented JavaScript

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. How javascript objects work – Helephant.com. Javascript is a flexible language that supports structuring code in procedural, functional or object oriented ways.

How javascript objects work – Helephant.com

Although it is not exclusively object oriented like C# or Java, there are many language features that support creating and using objects if that is the way you like to structure your code. This series of articles digs deep into each of those language features and shows how they can be used to create object oriented code. Learn how to create and manage objects in plain javascript or just understand what your favourite framework is really doing. I hope it helps you appreciate the beauty and flexibility of a such an important language, which was designed to make it easy for novice programmers to be productive while having more advanced features for experienced developers building large and complex systems. Named function expressions demystified.

Introduction Surprisingly, a topic of named function expressions doesn’t seem to be covered well enough on the web.

Named function expressions demystified

This is probably why there are so many misconceptions floating around. In this article, I’ll try to summarize both — theoretical and practical aspects of these wonderful Javascript constructs; the good, bad and ugly parts of them. No more clientside spaghetti. Organizing your code. The single biggest challenge you'll have when building complex clientside applications is keeping your codebase from becoming a garbled pile of mess.

No more clientside spaghetti. Organizing your code.

If it's a long-running project that you plan on maintaining and changing over time, it's even harder. Features come and go. You'll experiment with something, only to find it's not the right call and leave traces of old code sprinkled throughout. I absolutely despise messy code. It's hard to read, hard to maintain, hard to collaborate on, and it's just plain ugly to look at.

Complexity sneaks up on you. Here are a few techniques, crutches, coping mechanisms, and semi-pro tips for staying sane. Using events: Modules talking to modules. How do you keep your modules cleanly separated?

Using events: Modules talking to modules

Sometimes modules are dependent on other modules but we still want to be able to keep them loosely coupled? One good technique is triggering lots of events that can be used as hooks by other code. Many of the core components in Node are extensions of the EventEmitter class. JS: The Right Way. jQuery jQuery is a fast, small, and feature-rich JavaScript library.

JS: The Right Way

Built by John Resig. Built by Yahoo! , YUI is a free, open source JavaScript and CSS library for building richly interactive web applications. New development has stopped since August 29th, 2014. Javascriptguide. Functions are first class objects in javascript – Helephant.com. Functions in javascript are first class objects.

Functions are first class objects in javascript – Helephant.com

This means that javascript functions are just a special type of object that can do all the things that regular objects can do. Really, just like any other variable Here are a few of the important objects things that you can do with a function in javascript. A function is an instance of the Object type: function feedCat(){ alert("Kibble, tinned food and water");}alert(feedCat instanceof Object); How to Write Highly Scalable and Maintainable JavaScript: Modules. Chapters Introduction So far we've covered the so-called “wild west” syndrome and some reasons for needing better organized JavaScript code bases, as well as namespacing as one strategy to achieve this goal.

How to Write Highly Scalable and Maintainable JavaScript: Modules

How to Learn ES6 — JavaScript Scene. GitHub - ericelliott/essential-javascript-links: Essential JavaScript website. 10 Mistakes That JavaScript Beginners Often Make. Martin Angelov JavaScript is an easy language to get started with, but to achieve mastery takes a lot of effort.

10 Mistakes That JavaScript Beginners Often Make

Beginners often make a few well-known mistakes that come back and bite them when they least expect. To find which these mistakes are, keep reading! 1. Missing curly braces. Learning JavaScript Design Patterns. Design patterns are reusable solutions to commonly occurring problems in software design.

They are both exciting and a fascinating topic to explore in any programming language. One reason for this is that they help us build upon the combined experience of many developers that came before us and ensure we structure our code in an optimized way, meeting the needs of problems we're attempting to solve. Design patterns also provide us a common vocabulary to describe solutions. Writing Testable JavaScript. We’ve all been there: that bit of JavaScript functionality that started out as just a handful of lines grows to a dozen, then two dozen, then more. Along the way, a function picks up a few more arguments; a conditional picks up a few more conditions. And then one day, the bug report comes in: something’s broken, and it’s up to us to untangle the mess. Eloquent JavaScript.

Es Bueno / Self-Executing Anonymous Functions or How to Write Clean Javascript. Feb 20th 2014 · Permalink Let’s talk about anonymous self-executing functions. Go ahead, say that out loud and let the kids next to you know that you’re big time now. Simple JavaScript Inheritance. I’ve been doing a lot of work, lately, with JavaScript inheritance – namely for my work-in-progress JavaScript book – and in doing so have examined a number of different JavaScript classical-inheritance-simulating techniques.

Out of all the ones that I’ve looked at I think my favorites were the implementations employed by base2 and Prototype. I wanted to go about extracting the soul of these techniques into a simple, re-usable, form that could be easily understood and didn’t have any dependencies. Additionally I wanted the result to be simple and highly usable. Here’s an example of what you can do with it: OOP in JS, Part 1 : Public/Private Variables and Methods. This page shows how to create private variables and methods in "classes" in Javascript through the rather simple example of a person. (This is really a very rough approximation of the classical OOP pattern, and not necessarily a "best-practice" for JavaScript programming.) Part 2 covers inheritance. Summary. An Introduction to Functional Programming in JavaScript. For me, in many ways, 2011 has been the year of the rediscovery of JavaScript.

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.

Airbnb/javascript. Introduction to Object-Oriented JavaScript. 6. Objects and classes by example - Mixu's Node book. Javascript Closures. AddEventListener vs onclick. Custom events in IE without using libraries. Events - Javascript dispatchEvent is not working in IE9 and IE10. Introduction to clean javascript design. Despite all the efforts spent to replace it with something more decent (e.g. Flex, Dart, Silverlight,…), javascript is still today the language of choice for browser-side scripting. And given the huge spotlight that HTML5 is directing on the browser, it becomes again an extremely popular language. Simple Inheritance with JavaScript.

This article is part of a web dev tech series from Microsoft. Thank you for supporting the partners who make SitePoint possible. A lot of my friends are C# or C++ developers. How do JavaScript closures work? JavaScript like a Boss: Understanding Fluent APIs. While designing Babylon.js v2.0 (a library for building 3D on the web), I recently found myself wishing that more APIs were fluent – that is, I wish the community could more easily read, understand, and build upon the work while spending less time in the tech docs.

In this tutorial, I’ll walk through Fluent APIs – what to consider, how to write them, and cross-browser performance implications. What Makes an API Fluent? A fluent API, as stated by this Wikipedia article, is an implementation of an object-oriented API that aims to provide for more readable code. jQuery, for example, is a great example of what a fluent API allows you to do: A fluent API lets you chain function calls by returning the this object. JavaScript: 2015 in Review. JavaScript. JavaScript (JS) is a lightweight, interpreted, programming language with first-class functions. Most well-known as the scripting language for Web pages, many non-browser environments also use it, such as node.js and Apache CouchDB.

JS is a prototype-based, multi-paradigm, dynamic scripting language, supporting object-oriented, imperative, and functional programming styles. Instantiation Patterns In JavaScript. Writing Next Generation Reusable JavaScript Modules in ECMAScript 6.