Yes, we're fixing that as we speak. It will be up to date shortly.

chubasco · on Jan 30, 2017

I am considering buying this for an engineer that works for me to get up to speed on React in the very near future. I only want to start him on ES6+ syntax though. How long do you think until it will be up-to-date?

jashmenn · on Jan 31, 2017

The first chapter has already been updated to use ES6 class syntax, and we explain how it works there. We're converting the rest of the book to use ES6 classes (and removing createClass) over the next week or two.

triplezero000 · on Jan 30, 2017

You should remove your header of "up-to-date" on your marketing page until you get that fix in place.