List of ECMAScript 6 features
A list of lists:
- Luke Hoban (+27 contributors) compiled a comprehensive list of the features new with ES6 on GitHub.
- Another list, which puts ES6 and ES5 syntax aside of each other, is es6-features.org. That list was originated by Ralf Engelschall (+ 20 contributors).
- And there is jsfeatures.in, which has ES5, ES6, and ES7 features with a search function.