KeywordĮS6 introduced the let keyword, which allows for block-scoped variables which cannot be hoisted or redeclared. I explain the concepts of scope and the differences between let, var, and const in the Understanding Variables, Scope, and Hoisting in JavaScript resource on DigitalOcean. Variables and constant feature comparison Here is a key of most identifier names used throughout this reference. Some of the most important features include let and const declarations, arrow functions, enhanced object literals, template literals, destructuring, and the rest and spread operators. You may see the following suggestions so short that they make. ES6 introduces many new features and syntax improvements that make it easier to write and maintain complex JavaScript applications. However, in this resource I'll be using let in place of var for all ES6 examples. In this article, Im gathering my top new syntax brought with ES6 I loved and used in my code. Note: A commonly accepted practice is to use const except in cases of loops and reassignment. Here is an overview of some of the most common features and syntactical differences, with comparisons to ES5 where applicable. ECMAScript 2015, also known as ES6, introduced many changes to JavaScript.
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