ECMAScript is an updated version of javascript. It was released in 2015 that’s why we also know ES6 as ECMAScript 2015. This is fully compatible with all modern browsers from 2017. In this blog, you learn about different keywords used in javascript or ES6. After reading this blog you get clear information about arrow function, let, var, and const keyword used in modern javascript. https://www.developersnation.co.in/3-important-thing-about-javascript-every-developer-should-know/