In Javascript, what does the reserved keyword "short" do?

Question

I'm merely trying to find the definition and usage of the key word, short, in JavaScript. I do not care about backwards compatibility and the likes, as to say that I don't want responses as to if, how, and why it may be an up to date syntax. I just want the definition. A Simple example would be best. Thank you.

Answer 1

They belong to the so-called future keywords by the ECMAScript specification.

They have no special functionality at present, but they might at some future time, so they cannot be used as identifiers.

short as a reserved word was part of an old ECMAScript specification:

The following are reserved as future keywords by older ECMAScript specifications (ECMAScript 1 till 3)
[...] short [...]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords

In ECMAScript 5/6 short was removed from the list of reserved words. Nonetheless for compatibility with older browsers not implementing either, you shouldn't use it anyway.