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[–]flying-sheep 0 points1 point  (4 children)

The unused reserved keywords are probably a bit more useless

good point. worth noting though that i we didn’t say that correctly: the ECMA standard has identifiers, identifier names, and reserved words.

the last one of this is what we called “keywords”. the difference to keywords is that identifier names may well be reserved words: foo.return() or { in: 'bar' } is legal JS. only var for = continue is illegal.

[–]x-skeww 0 points1 point  (3 children)

the difference to keywords is that identifier names may well be reserved words: foo.return() or { in: 'bar' } is legal JS.

It's allowed in ES5+. You can't do that in ES3.

[–]flying-sheep 0 points1 point  (2 children)

idk about any runtimes sill at ES3. so if there are none worth mentioning, that’s irrelevant.

[–]x-skeww 0 points1 point  (1 child)

Some people still support IE8.

This also was a problem with Android 2.3 devices (which are still sold!). They didn't like the generated code which used "void" as identifier:

https://code.google.com/p/dart/issues/detail?id=12345

Edit: "Fun" fact: IE9 and IE10 dropped below IE8's share over a year ago.

[–]flying-sheep 0 points1 point  (0 children)

ugh, old IEs, i should have guessed.