Just bought the book. This is a front-end tech lead for Yahoo writing a book about a new language revision, and this is when I buy in and really start paying a

Just bought the book. This is a front-end tech lead for Yahoo writing a book about a new language revision, and this is when I buy in and really start paying attention. I've been reading some interesting ES6 materials, but the absolutely most worthwhile reference is that written by a hardcore practitioner that's a key contributor to massively used products.