scope & closure technical review - [email protected] about you-dont-know-js HOT 13 CLOSED

var = 2; 

as a program. That jars a bit.

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I can't help thinking you're really over-explaining scope with the compiler stuff. Do we really need to think like the Engine to understand it?

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I'm assuming you caught the missing image in the chapter 1 of the scope section.

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I don't want to be a broken record on the broken images, so will just note images not showing in chapter 2 of the closure section.

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Chapter 2 again, the note on accessing global object properties is abruptly introduced, and I don't think you defined what you mean by "shadowed" variables before using the term.

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Should mention how "with" is deprecated, and strict mode's impact on eval and variable scope. You mention this somewhat, but not explicitly.

And I'm not sure why you cover them and then tell people not to use them. Confusing.

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FYI: there are no images up on the repo yet. this is mostly a production issue, since images that are produced for a printed book require special care. i just haven't focused on that part of the workflow yet. Since I describe the images, the content should stand alone without them. If not, that's something to note in its own right. I may put images up on github at some point, not sure yet.

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Thanks, wasn't sure if we were supposed to report those or not.

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In chapter 3 of the closure and scope section you state "Some developers prefer a more explicit block-scoping, with dedicated blocks for scoping rather than implicitly hijacked block", but you don't give any reason why.

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Regarding let and const, is there a reference somewhere that covers browser support on these very new functionalities?

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Just wanted to note that Chapter 4 in the closure section, Hoisting, really pulls together your previous material. Well done.

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Chapter 5 on closure, not sure if you're concerned about JSLint giving a "don't make functions within a loop" warning with your anon function and timer example.

Also, am assuming you're giving folks a heads up on let elsewhere.

Otherwise, again pulls together the whole section. Good job.

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Thanks for all the great feedback. I've finished posting revisions that take your comments into account.

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