Update 01-introduction.md

made a lot of random edits. hope you don't mind. feel free to reject any you don't like of course :)
Update 02-the-basics.md
Merge pull request #1 from suisea/patch-1

Update 01-introduction.md
Update 02-the-basics.md

note: "For this book, we will focus on using Chrome and its developer tools for two reasons: Chrome has a a set of versatile and powerful tools, and focusing on the tools of one browser helps keep the instructions simple." you say this yet two paragraphs away you tell the reader they should also look at Firefox! maybe reword that paragraph from "You should" to "It's also good to familiarize yourself with", etc.

Line 69, I changed from "We learned that", which doesn't make sense with line 70 ("We learned that: the javascript console". Reword?)
Update 02-the-basics.md

random comment: <br> can also be written as <br />, yeah, which kind of is a tag that closes itself, eh?

updated img example to be a bit more helpful

"The `img` element is also a self-closing tag, meaning it has a forward-slash before the closing angle bracket." possibly explain what it means to "close" a tag at all, for absolute beginners in html?

or maybe you're assuming people already know basic html/coding. that's okay, too.

* surprised you didn't include W3Schools in your html/css resource list

Variables: you go from talking about html + css to Variables. is the reader to assume that you're talking about javascript now/again? there's absolutely no transition here and to me as a reader, the sudden subject change (without any transition/new chapter/etc) very jarring and I'm confused.
Update 01-introduction.md

fixed typo in line 31. That was a really bad one. Seriously I was wondering what "pf colons" were until I suddenly realised you meant "instead OF colons"
Update 01-introduction.md

fixed typo in line 31. That was a really bad one. Seriously I was wondering what "pf colons" were until I suddenly realised you meant "instead OF colons"
Update 02-the-basics.md

lines 400-408 -- ahh! really bad! no ```!!! really badly formatted in the final version of the book!
Update 02-the-basics.md
Update 02-the-basics.md
Update 03-data-types.md
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Merge branch 'master' of github.com:learn-js/learnjs-01-introduction
fix conflict
other fixes from sui
fix loop code typos
compile book.md
refactor chapters
more chapter refactoring
part 3