1999
ES3
2009
ES5
ES2015
2015
2000
JavaScript 2.0 (ES4)
http://www-archive.mozilla.org/js/language/js20-2000-07/
var|const v:type = value;
kinda leak thing going on here. When babel is transpilling ES6 modules.
babel -> common.js
add some things to the runtime, declaritve ahead of time 16min
1 - Declare all your exports
2 -