Disagree. I've been writing JavaScript for twenty years, and I'm very aware that there's a lot of "new" stuff that I need to brush up on. When I saw it call itself "modern" I instantly assumed that it would be covering the kind of information I need to know.
I, as a JS dev of 10+ years, wouldn't consider this "modern". I didn't see
- for in loop
- for of loop
as a couple examples, and those have been around for at least a few years now. There's probably more missing too. To what the above person said. The usage of "modern" or "latest" or similar is going to fall behind and make for bad searching.
Disallowing for..of iterators is the reason I cannot use or recommend the Airbnb lint preset. A very nice example of an anno 2014-2017 cargo cult that clearly hasn't held up. https://github.com/airbnb/javascript/issues/1271
for/of is an iterator. It consumes the Symbol.iterator interface and is totally different from the for(i++) statement.
That eslint rule is a good example of a cargo cult. The second link in its rationalization argues for using underscore over touching a dangerous loop yourself.
i think it's great on how it brushed on forms and web api's, but in your case it seems exploringjs.com would be a fit (grouped by ecmascript versions).
OTOH out of scope are server-side JS (NodeJS), transpilers like babel, bundlers like webpack, and of course package managers like npm and yarn
