Take a look at this site http://es6-features.org/ http://es6-features.org/ there is even comparison ES6 vs ES5 code. You can just go over every feature really f

Take a look at this site http://es6-features.org/ http://es6-features.org/ there is even comparison ES6 vs ES5 code. You can just go over every feature really fast a then you may get rough idea where to look next time you feel lost.