The let KeywordĮS6 introduces the new let keyword for declaring variables. In this chapter, we will discuss some of the best ES6 features that you can use in your everyday JavaScript coding.
It introduces several new features such as, block-scoped variables, new loop for iterating over arrays and objects, template literals, and many other enhancements to make JavaScript programming easier and more fun. It defines the standard for the JavaScript implementation.ĮS6 brought significant changes to the JavaScript language. What is ECMAScript 6 (or ES6)ĮCMAScript 2015 (or ES6) is the sixth and major edition of the ECMAScript language specification standard. X.In this tutorial you will learn about the new features in latest version of JavaScript. Here is some ES5 code that will calculate the square of every value in an array and log the value to the console var x = TC39 should embrace, clean-up, and extend rather than re-invent or compete with de-facto and nearby de-jure standards. Hard to beat C# and CoffeeScript here (we want the unparenthesized single-parameter form as in C#). Check out the wiki regarding arrow functions: If you’re a C# developer who has ever used lambda expressions, the syntax will feel very familiar. The most common approach is probably the special constructor function like this function Car( make ) There are several options to approximate classes in ES5. In this post I’ll cover classes, Arrow Functions, Modules, Block Scoping, and Promises. There are quite a few new features in ES6, many still in draft form. ES6 will tackle many of the core language shortcomings addressed in TypeScript and CoffeeScript. Both TypeScript and CoffeeScript provide syntactic sugar on top of ES5 and then are transcompiled into ES5 compliant JavaScript.
NET world (and here at Wintellect) and CoffeeScript is kind of a big deal™ in the Ruby community. As such, several workarounds have emerged. Folks coming from the backend development space find ES5 lacks some pretty basic language features. The current version of EcmaScript supported in modern browsers is ES5 (with some ES6 support). A new version of EcmaScript will have a broad impact on web development. 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. Naming aside, JavaScript is one of the most important languages in existence today. Brendan Eich, the original developer of JavaScript, once wrote that the name EcmaScript sounds like a skin disease. If you think EcmaScript is a terrible name, you’re not alone.
EcmaScript is the standardized scripting language that JavaScript (and some other languages, like ActionScript) implement.
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