Agreed, I own this book and it was great several years ago but it does not include ES5, 6 and now 2016, 2017. I think you're better off learning online. Or to g

Agreed, I own this book and it was great several years ago but it does not include ES5, 6 and now 2016, 2017. I think you're better off learning online. Or to get started read it and then add to the knowledge here: http://es6-features.org/#Constants http://es6-features.org/#Constants (whoever set up that site is great, it's helped me out).