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2. JavaScript Conquered the Web. Now It’s Taking Over the Desktop. JavaScript was originally created in 1995 to give web pages a little more pep than the <blink> tag could provide.

JavaScript Conquered the Web. Now It’s Taking Over the Desktop

Today it has far more powerful uses. Companies like Google and Facebook build complex, desktop-like web applications with JavaScript; since the launch of Node.js in 2009, it’s also become one of the most popular languages for building server-side software. Today, even the web isn’t big enough to contain JavaScript’s versatility: it’s now making its way into applications for the desktop. Electron is a software development platform created by Github that lets developers use JavaScript along with other web technologies like HTML and CSS to create desktop applications that can run on Windows, Macintosh OS X, and Linux.

The company released the first full version of Electron yesterday. Last year, Microsoft released a code editor called Visual Studio Code that was built using Electron. Untangling Spaghetti Code: Writing Maintainable JavaScript. This article was peer reviewed by Tom Greco, Dan Prince and Yaphi Berhanu.

Untangling Spaghetti Code: Writing Maintainable JavaScript

Thanks to all of SitePoint’s peer reviewers for making SitePoint content the best it can be! Almost every developer has had the experience of maintaining or taking over a legacy project. Or, maybe it’s an old project which got picked up again. Common first thoughts are to throw away the code base, and start from scratch. The code can be messy, undocumented and it can take days to fully understand everything.

I’ve had to take over and clean-up a lot of projects. Refactoring a javascript video store. The simple example of calculating and formatting a bill for a video store opened my refactoring book in 1999.

Refactoring a javascript video store

If done in modern Javascript, there are several directions you could take the refactoring. I explore four here: refactoring to top level functions, to a nested function with a dispatcher, using classes, and transformation using an intermediate data structure. Many years ago, when I was writing the refactoring book, I opened the book with a (very) simple example of refactoring some code that calculated a customer's bill for renting some videos (in those days we had to go to a store to do that). ES6 Modules. JavaScript Module Systems Showdown: CommonJS vs AMD vs ES2015. As JavaScript development gets more and more common, namespaces and dependencies get much more difficult to handle.

JavaScript Module Systems Showdown: CommonJS vs AMD vs ES2015

Different solutions were developed to deal with this problem in the form of module systems. In this post, we will explore the different solutions currently employed by developers and the problems they try to solve. Read on! What is the best way to learn JavaScript? - Quora. Learning ES6: Promises. Like clockwork the Learning ES6 series continues on, looking at promises.

Learning ES6: Promises

It will be the first feature we’ve looked at in this series that really is more than syntactic sugar. But promises aren’t entirely new to JavaScript. They’ve existed for quite some time in helper libraries. A Practical JavaScript (ES6 and Beyond) Cheat Sheet by Toptal Developers. ECMAScript 6 (ES6) is the latest standard specification of JavaScript, the programming language of the Web.

A Practical JavaScript (ES6 and Beyond) Cheat Sheet by Toptal Developers

Since HTML5 and the birth of Node.js, the runtime that allows us to run JavaScript on the server or desktop, JavaScript has gained a unique momentum. There is a growing adoption rate among enterprises, embracing it into production, and thus its newest features were greatly awaited. We created this cheat sheet as a list of ES6 features we use everyday. Trying to be comprehensive but concise at the same time, new API methods are left apart. For those who need them, make a quick search by yourself or try to explore the MDN documentation to catch the latest experimental APIs. ES2015 - Let and Const. ES 2015: The next javascript version today - Roland Guijt. ES2015 in browser with Babel. Using ES6 today: The future of javascript has arrived - Wisdom Geek. Most of you would already be aware that javascript is an implementation of ECMAScript (ES).

Using ES6 today: The future of javascript has arrived - Wisdom Geek

ES is the standardized language specification, and javascript is the dialect or the implementation. After the ES5 standardization in 2009, there were no updates to it. And since then, javascript has evolved a lot. It is no longer a scripting language that runs on the client side. Nor is it restricted to the web.

Introduction to Babel. Introduction to Babel. Making ES6 happen with ChakraCore and Node - Christian Heilmann. Learning ES6: Classes. We’re going from enhanced object literals that look a lot like classes to actual classes in ES6.

Learning ES6: Classes

We’ll learn, however, that these aren’t really classes, but syntactic sugar over the existing prototype functions in JavaScript. Let’s continue on with the Learning ES6 series series! ECMAScript 6 provides syntactic sugar over the prototype-based, object-oriented pattern in JavaScript. ES6 classes provide support for constructors, instance and static methods, (prototype-based) inheritance, and super calls. Instance and static properties are not (yet) supported. ES6 Modules. Training on ES6 Features Array Prototype Methods. Training on ES6 Features Rest parameter and spread operator. Training on ES6 Features ES6 Classes. 210 JSJ The 80/20 Guide to ES2015 Generators with Valeri Karpov. JavaScript ES6 / ES2015 - [11] Generators. JavaScript ES6 / ES2015 - [10] Promises. JavaScript ES6 / ES2015 - [09] Arrow Functions. JavaScript ES6 - WeakMaps.

JavaScript ES6 - Proxy. JavaScript ES6 - Set. ES2015 Code Coverage and Jest (React JS Unit Testing) If you're new here, you may want to subscribe to my RSS feed.

ES2015 Code Coverage and Jest (React JS Unit Testing)

[fb-optin-form uid='' nofollow=false style='main' titletext='You can also get the feed via email. Sign up now by supplying your email address and clicking the Subscribe button' nonloggedonly=false] As I’ve mentioned before, I’m in the middle of putting together a React reference app and I’m doing it using Test Driven Development. The problem is, the standard tools for implementing ES2015 code coverage with Jest make it hard to see at a glance if you have 100% code coverage or not because of some issues with the way Jest tells Babel to do the transformations by default, the way Babel transforms the code and implements the auxiliaryCommentBefore option and the way that Istanbul parses the ignore next comments.

I’ve been working on solving this problem for the last month and a half off and on. Diagnostics For those who are interested in how I figured this out. JavaScript ES6 / ES2015 - [07] Default Params & Spread Operator. JavaScript ES6 / ES2015 - [06] New String & Number Methods. JavaScript ES6 / ES2015 - [05] Template Literals. JavaScript ES6 / ES2015 - [04] Classes and Inheritance.

JavaScript ES6 / ES2015 - [02] Compile ES6 With Babel. JavaScript ES6 / ES2015 - [01] Introduction. Javascript tagged template strings in ES6 (new string functions tutorial ) ES2015 Fat Arrow Functions—Josiah Krutz. ES6 Subclasses and Object.defineProperty - Art & Logic: Custom Software Development Company. (Photo by William Warby) Object.defineProperty provides a handy way to add properties to JavaScript objects.

ES6 Subclasses and Object.defineProperty - Art & Logic: Custom Software Development Company

It’s been around for a while, but with the introduction of class syntax in ES6, it’s not immediately obvious how to use it to add properties to a class, as opposed to an instantiated object. ES6 (now renamed ES 2015) adds syntactic sugar to support the appearance of traditional class inheritance. Now, rather than using prototypical inheritance directly, it’s possible to write code that looks more familiar when coming from other languages: In some cases, such as for data model classes, there might be a large number of properties.

In contrast, here’s a Backbone.Model class that repetitiously defines a getter and setter for each attribute, which are necessary because the server attribute names don’t match the frontend model property names: There’s duplicate, boilerplate code here, which creates a potential for bugs. Object.defineProperty to the rescue. Es6-promise. A lightweight library that provides tools for organizing asynchronous code This is a polyfill of the ES6 Promise. The implementation is a subset of rsvp.js, if you're wanting extra features and more debugging options, check out the full library. For API details and how to use promises, see the JavaScript Promises HTML5Rocks article. Angular2: A TDD Intro In ES6 (1/3) Visual Studio 2015. Better JavaScript with ES6, Pt. III: Cool Collections & Slicker Strings.

Creating Modules in JavaScript with ES7 and BabelJscrambler Blog. Last year the new version of JavaScript was released and it gave us a lot of new goodies. Amongst those was syntax for importing and exporting of modules which finally codified “the only way” to do modules in JavaScript. Or well, eventually. Another nice thing is that it’s specced in such a way that you can statically analyze the whole module dependency tree. Pretty awesome. Let’s take a quick look at what they are: import v from "mod"; import * as obj from "mod"; import {x} from "mod"; import {x as v} from "mod"; import "mod"; export var v; export default function f(){}; export default function(){}; export default 42; export {x}; export {x as v}; export {x} from "mod"; export {x as v} from "mod"; export * from "mod"; So basically you can import the main value of a module (the “default”), or a specific property from explicit exports, a combination of this, or everything.

For ES7 there are some small additions proposed to extend this syntax. 6 Things to Start with in ES6 (ECMA 6/ ES2015) - The New JavaScript. 20 - 25 mins read Moving to the new JavaScript At the time of this writing, ES6(aka ECMA 2015/ ES2015) is widely accepted and implemented across different platforms. JavaScript is now a mainstream language and it's all over the place. From application frontend to application backend, to databases, to platforms, to robotics (and much more), you can do it all in one universal language called "JavaScript".

Since the re-advent of JavaScript(jQuery days and others), it has evolved and emerged as a one-stop-shop for different kinds of applications and the popularity of this language has increased by leaps and bounds. Learning ES6: Enhanced Object Literals. Wow, we’re making some good progress covering ECMAScript 6 features in this Learning ES6 series series. We most recently covered template literals and arrow functions. Now we zero in on the enhancements to object literals, another piece of ES6 syntactic sugar. ECMAScript 6 makes declaring object literals even more succinct by providing shorthand syntax for initializing properties from variables and defining function methods. It also enables the ability to have computed property keys in an object literal definition. The enhanced object literals code examples page has many more examples showing off each feature in more detail. Continue on for more details! My 12 Favorite ES6/ES2015 Features — Capital One Developers.

1. Default Parameters in ES6 When we write modules, we need to account for cases when the arguments will be omitted. In other words, good modules must be smart enough to have default values for parameters. State of the JavaScript Landscape: A Map for Newcomers. If you have previous programming experience but are a newcomer to frontend JavaScript development, the array of jargon and tools can be confusing. Without getting bogged down in detailed discussion, let’s take a general survey of the current “JavaScript landscape”. This should orient you sufficiently to start your journey into frontend development. Key terms are bolded. If you want to skip ahead to a repository with working boilerplate, I've put together a Github repository with my recommendations. Writing Next Generation Reusable JavaScript Modules in ECMAScript 6. Are you excited to take advantage of new JavaScript language features but not sure whereto start, or how?

You’re not alone! 10 Javascript Aside ES6 Classes. 14 Modules and ES6. Better JavaScript with ES6, Pt. II: A Deep Dive into Classes. # Out with the Old, In with the new Let's be clear about one thing from the start: Under the hood, ES6 classes are not something that is radically new: They mainly provide more convenient syntax to create old-school constructor functions. ~ Axel Rauschmayer Functionally, class is little more than syntactic sugar over the prototype-based behavior delegation capabilities we've had all along.

Understanding The Babel 6 Compiler Tutorial. Babel is a JavaScript transpiler. It can take ES2015, or now ES2016 code and make it work on your web browser by transpiling it to ES5. This is important because not all web browsers support the new ECMA standards as of this writing. I wrote about Babel last year and it has changed somewhat. ES6 Symbols: Drumroll Please! ES6 module loading: More complicated than you think - NCZOnline. One of the most long-awaited features of ECMAScript 6 is the formal definition of modules as part of the language. For years, JavaScript developers have struggled with organizing their code and needing to decide between alternate ad-hoc module formats like RequireJS, AMD, and CommonJS. Formally defining modules as part of JavaScript will eliminate a lot of heartache in the future, but right now, there is still a lot of confusion about how modules work.

ES6+ code coverage with Babel plugin. Running unit tests against an ES6+ source code base has now become an almost trivial task, thanks to Babel and all the ecosystem around it. There are a lot of good resources explaining how to do that, with different tools and frameworks. On the other hand, code coverage on this kind of tests is a rather less covered subject … JavaScript ES6 Tutorial #11 - Generators. Gulp-es6. ES6 Succinctly · @kamran. ES6, ES2015 or Harmony has brought a number of interesting features to the table and this article is going to be a drill-down in all those new features that it has to offer. Agreed, ES6 is out since June 2015 and a lot has been written about the new features since then and you are better off without another article ..but it isn’t going to stop me from writing it.

Let's Learn ES2015. The following is a guest post by Ryan Christiani. Ryan is a teacher at HackerYou and has been working on a video series called Let's Learn ES6. He offered to put some of that together into a tutorial format, which I thought was perfect as we haven't covered ES2015 much here on CSS-Tricks. Let's Learn ES6. How to async in JavaScript. ES6features - What do you have to know about the current and next state of Javascript. Chris Laughlin. GitHub - kensterz/interview-questions-in-javascript: A mostly reasonable collection of technical software development interview questions solved in Javascript. An early look at three high-impact ES6 features coming soon to Node.js. Web Updates - Google Developers. JS Rocks. Learn ES2015 · Babel. Read Understanding ECMAScript 6. ECMAScript 6 - ES6 Cheat Sheet by romansemko. 5 Tips To Improve Your JS with ES6 - Crater Conf Talk. JavaScript spread operator and rest parameters tutorial ES6 / ES2015.

6 reasons Web developers need to learn JavaScript ES6 now. Future of JavaScript & ECMAScript 6 (ES2015) Subclassable Built-ins & New Containers. The most useful features of ES6/ES2015. ES6 Arrow Functions in JavaScript tutorial ( Fat Arrow Function Expression es2015, ecma6) @ThingsExpo #IoT #JavaScript #TypeScript #Angular2. Exploring ES6 by Max Stoiber - Opbeat blog. GitHub - DimitriMikadze/es6-simple-starterkit: Simple to understand and use ES6 Starter Kit. ES6 cheatsheet. WebPack Code splitting with ES6 and Babel 6. JavaScript Releases: ES2016 and Beyond. Start Using ES6/ES2015 In Your Project With Babel and Gulp - barbarian meets coding. All Aboard the ES6 JavaScript Train. Let's Learn ES6. Getting Started with ES2015 and Babel. ES6 Interactive Guide. Lukehoban/es6features: Overview of ECMAScript 6 features.

ES6 Arrow Functions: The New Fat & Concise Syntax in JavaScript. Writing Next Generation Reusable JavaScript Modules in ECMAScript 6. ES2015 JavaScript Primer.md. JavaScript in 2016 - Language Enhancements - Telerik Developer Network. Understanding-es6/README.md at master · sgaurav/understanding-es6. Exploring Real Time Apps with VueJS, ES2015 and Webpack. Sgaurav/understanding-es6 - JavaScript - GitHub. Bevacqua/es6. Top 10 ES6 Features Every Busy JavaScript Developer Must Know. ECMAScript 6 compatibility table.