A Guide to ES6

What is ES6?

  • ECMAScript 6, JavaScript 6, or ECMAScript 2015
    • ECMAScript: European Computer Manufacturers Association
  • “6th version” of JavaScript, released in 2015
  • Some notable features include:
    • addition of Constants
    • Block-Scoped Variables and Functions
    • Arrow Functions
    • Default Function Parameters

Why does ES6 exist?

Short history of JavaScript


1995: JavaScript is born as LiveScript 1997: ECMAScript standard is established 1999: ES3 comes out and IE5 is all the rage 2000–2005: XMLHttpRequest, a.k.a. AJAX 2009: ES5 comes out (this is what most of us use now) with forEach, Object.keys, Object.create, and standard JSON 2015: ES6/ECMAScript2015 comes out;

“Top 10 Best Features”


  • Default Parameters in ES6
  • Template Literals in ES6
  • Multi-line Strings in ES6
  • Destructuring Assignment in ES6
  • Enhanced Object Literals in ES6
  • Arrow Functions in ES6
  • Promises in ES6
  • Block-Scoped Constructs Let and Const
  • Classes in ES6
  • Modules in ES6

Resources: https://www.w3schools.com/Js/js_es6.asp https://www.educba.com/what-is-es6/ https://www.tutorialspoint.com/es6/index.htm http://es6-features.org https://webapplog.com/es6/

Hiro Nishimura