JavaScript: Add article listing and explaining automatic features of iterables

[mdn]

JavaScript: Add article listing and explaining automatic features of iterables

[sideshowbarker]

@himanshugarg Thanks — so do you think this issue can be closed?

[a2sheppy]

I post these because I run into this sometimes, where I'm documenting something which is defined as an iterable and then have to remember what functionality gets baked in without being explicitly defined.

[himanshugarg]

The set - for...of loops, the spread operator, yield*, and destructuring assignment - is documented in

1. Iteration Protocols > Syntaxes expecting iterables and also a little differently in
2. Iterators and Generators > Syntaxes expecting iterables

Edit: forEach is not available with iterators - SO question

[himanshugarg]

Yes because those sections catalog the requested syntaxes, which a new article might duplicate.

[sideshowbarker]

OK, thanks @himanshugarg — closing per #2610 (comment)