I've already read most of the blog posts that make up the bulk of this book, but I'll still be buying the book to support Axel's work, and you should too. You won't be disappointed.

If you care about Javascript at all, this is a definite insta-buy.

Axel is one of those rare people who combine a truly deep knowledge about tech stuff with the ability to speak and write about it in a way that's accessible and at the right level of abstraction.

Considering how many ppl that now use mobile phones to surf the world wide web and that mobile phone's usually don't auto-upgrade their browser, and that we still need to polyfill ES5 features, I wonder how many years it will take until ES6 can be safely used without first "compiling" it to the ES5 standard.

I find this rather convenient - it strengthens the argument for considering languages other than ES6 that also compile to ES5 (Clojure, Scala, PureScript, TypeScript, etc).

People use IE8 still because they are running 10+ year old computers. Mobile phones tend to get upgraded much quicker.

By the time ES6 is everywhere you're using ES8 features which you'll have to polyfill/transpile.

Looks to be a great book.

I'm curious what the motivation is for some authors lately to make the whole book available free while making it available for sale?

Does it help with publicity or anything or is this mostly a gesture of generosity?

It's the equivalent of open-source, but for knowledge.

It's like: "Here's the content for free, if you like it, support it by buying the ebook"

I don't know how common this is but I've bought Kindle versions of several publicly available books after being able to spend some time reading them.

This is fantastic. Thanks Axel!

Indeed! Love the blog.

Hallelujah.