Example Get your own React.js Server const numbersOne 1, 2, 3 const numbersTwo 4, 5, 6 const numbersCombined. The importance of the standard revisions declined, features are denoted by the name of the proposal and not by the year they are expected to get released. ) allows us to quickly copy all or part of an existing array or object into another array or object. The TC39 committee then codified a process for adopting proposals which is still followed, and things get included in the specification releases (referred to as ES-next) when they're done. Lots of fancy things were expected to be included in ES7 (the new buzzword, along with ES6+), but ultimately failed to be finished on time (see Is ES7 only composed of two features?). You can use import and export in modules. ES6 modules are automatically strict-mode code, even if you don’t write 'use strict' in them. There’s no special module keyword a module mostly reads just like a script. The standards committee kept up their work, and changed to a new yearly release cycle (ES7=ES2016, ES8=ES2017, ES9=ES2018, …). These snippets of suspiciously-HTML-like code are not HTML, but a syntax extension to JavaScript based on ES6 called JavaScript XML. An ES6 module is a file containing JS code. When ES6 finally came, it was a major release that included a plethora of new features, but not all of the previously discussed ones. After vendors agreed to improve JavaScript and implement new features in their engines (which were possible before only using transpilers like CoffeeScript), lots of feature proposals were made and discussed under the term ES-harmony, with ES6 - the next revision of the standard that was expected to contain all those new features - being the big buzzword. This can be achieved with the help of default function parameters.ES6 (later rebranded as ES2015) simply was the first release after the language design process was ramped up. It may be handy to set a different value instead.
In JavaScript, the default value for function parameters is undefined. One can write code in ES5 and gradually switch to ES6 features with ease.īelow is the list of top ES6 features every JavaScript developer should know, With Object-Oriented Classes, Arrow Functions, String Literals and much more, ES6 is a feature-rich advancement to ES5, the previous version of JavaScript, and is 100% backwards compatible. With a lot of forward-thinking features (ES6) attached to it, JavaScript is an exciting language to program.ĮS6 is the basis for modern programming languages like Angular and ReactJs. ES6 has many new features that can help a developer understand and write code more efficiently. ES6 is a new standardized version of javascript that was released in 2015. ES6 or ECMAScript 2015 is the 6 th version of the ECMAScript programming language.
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