10 Need to Know JavaScript Concepts: Closures. Exploring ES6. ES6 Tutorial. 5 Great Features in EcmaScript 6 (ES6 Harmony) - Wintellect. EcmaScript is the standardized scripting language that JavaScript (and some other languages, like ActionScript) implement.
If you think EcmaScript is a terrible name, you’re not alone. Brendan Eich, the original developer of JavaScript, once wrote that the name EcmaScript sounds like a skin disease. Naming aside, JavaScript is one of the most important languages in existence today. Every browser has a JavaScript interpreter, JavaScript on the server is becoming ever more popular, and now it’s possible to use JavaScript for desktop (Chrome Apps), nativish mobile (PhoneGap) and native Windows 8 apps.
A new version of EcmaScript will have a broad impact on web development. The current version of EcmaScript supported in modern browsers is ES5 (with some ES6 support). There are quite a few new features in ES6, many still in draft form. There are several options to approximate classes in ES5. Approximate no more! Class Car { constructor(make) { //constructors! ECMAScript 6: New Features: Overview and Comparison. "A good programming language is a conceptual universe for thinking about programming.
" — Alan J. Perlis Constants Support for constants (also known as "immutable variables"), i.e., variables which cannot be re-assigned new content. Notice: this only makes the variable itself immutable, not its assigned content (for instance, in case the content is an object, this means the object itself can still be altered). ECMAScript 6 — syntactic sugar: reduced | traditional const PI = 3.141593; PI > 3.0; ECMAScript 5 — syntactic sugar: reduced | traditional Scoping Block-Scoped Variables Block-scoped variables (and constants) without hoisting. for (let i = 0; i < a.length; i++) { let x = a[i]; …}for (let i = 0; i < b.length; i++) { let y = b[i]; …} let callbacks = [];for (let i = 0; i <= 2; i++) { callbacks[i] = function () { return i * 2; };} callbacks[0]() === 0; callbacks[1]() === 2; callbacks[2]() === 4; Block-Scoped Functions Block-scoped function definitions.
Arrow Functions. Javascript ES6: Learn important features in a few minutes. The next-generation of javascript also known as ECMAScript 6 (also called ES6 or Harmony), is bringing us lots of amazing features that you probably will need to know.
But instead of you spend too much time learning and researching all of the features I separated a few that I felt are the ones you'll be probably using in your daily basis. Don't worry if you are new to javascript or you're coming from a server-side language, I believe this is the best time to learn it as ES6 has a much cleaner and friendlier syntax, known as sugar syntax. Sugar Syntax First of all, Syntactic Sugar is a syntax that make a language easier to understand and more readable, it makes the language "sweeter" for us. It also means that some "new" features of ES6 are not really new because ES6 is trying to simplify the syntax to make things easier for us. Look below the sugar syntax in action to create a class in Javascript. Classes Below is the new syntax to create classes. Inheritance in ES6 and Prototype: Modules. Learn ES2015 · Babel.
Es6features This document was originally taken from Luke Hoban's excellent es6features repo.
Go give it a star on GitHub! REPL Be sure to try these features out in the online REPL. Introduction ECMAScript 2015 is an ECMAScript standard that was ratified in June 2015. ES2015 is a significant update to the language, and the first major update to the language since ES5 was standardized in 2009. See the ES2015 standard for full specification of the ECMAScript 2015 language. ECMAScript 2015 Features Arrows and Lexical This Arrows are a function shorthand using the => syntax. Classes ES2015 classes are a simple sugar over the prototype-based OO pattern. Class SkinnedMesh extends THREE.Mesh { constructor(geometry, materials) { super(geometry, materials); this.idMatrix = SkinnedMesh.defaultMatrix(); this.bones = []; this.boneMatrices = []; //... } update(camera) { //... super.update(); } static defaultMatrix() { return new THREE.Matrix4(); }} Enhanced Object Literals Template Strings Destructuring Unicode. ES2015 Crash Course.