JavaScript enum Keyword

Question

I am a C ++ programmer (not very good), and I know what enum is. When I was reading about lexical grammar (Source MDN), I saw a new keyword, enum. I tried it on NodeJS. And it works! (Well yes, but actually no ...).

enum someEnum {
    
}

And NodeJS throws an error...

SyntaxError: Unexpected reserved word
←[90m    at wrapSafe (internal/modules/cjs/loader.js:1060:16)←[39m
←[90m    at Module._compile (internal/modules/cjs/loader.js:1108:27)←[39m
←[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1164:10)←[39m
←[90m    at Module.load (internal/modules/cjs/loader.js:993:32)←[39m
←[90m    at Function.Module._load (internal/modules/cjs/loader.js:892:14)←[39m
←[90m    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)←[39m
←[90m    at internal/main/run_main_module.js:17:47←[39m

But look! NodeJS considers it a keyword. The question is, is there a right way?

enum doesn't do anything currently. It's just a reserved keyword for the futuer. — VLAZ
– VLAZ, Commented Aug 3, 2020 at 4:03

dominicm00 · Accepted Answer · 2020-08-03 04:07:52Z

2

As said in the MDN source you linked, enum has been reserved for future use, but the functionality has not been implemented yet. You can either use the enum package, or use something like Typescript that does implement enums.

answered Aug 3, 2020 at 4:07

dominicm00

1,62013 silver badges24 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

hgb123 · Accepted Answer · 2020-08-03 04:08:43Z

1

If you notice, its section is Future Reserved Keywords, which

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

Currently, enum is supported in JS's superset, Typescript

answered Aug 3, 2020 at 4:08

hgb123

14.9k3 gold badges24 silver badges43 bronze badges

Collectives™ on Stack Overflow

JavaScript enum Keyword

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related