What alternative does uglify have with EcmaScript 2015/7 support?

Question

JavaScript

How can scripts that contain new syntax (let, for..of ...) be minified? I know it's possible to replace these syntaxes with ES5 compatible ones using Babel, but "pure" ES is definitely faster and easier to catch errors (Babel adds double try..catch above for..of loops).

Answer 1

Try using your let or there class in IE9 and you'll be surprised how nothing will work at all. At the moment, it hardly makes sense to use ES6 live, only through Babel.