Rewind to June 2015. ECMAScript 2015 (ES6) drops like a bombshell. After 6 years of stagnation, JavaScript suddenly gets classes, arrow functions, template literals, destructuring, promises, modules, let / const — features that made it look like a real language.
The best ES6 courses on Udemy share a secret recipe: es6 udemy
Overnight, every front-end developer felt two things: Rewind to June 2015