Numeric enums may be not be type safe

[vituchon]

HI there, how you doing guys? Hope fine.

I was studying a little bit the diff between using enums vs (union types + literal types) on this post at stackoverflow.

A given person states the following in his answer

3. Numeric enums are not type safe
   You can assign any number to numeric enums.

 enum ZeroOrOne {
  Zero = 0,
  One = 1
}
const zeroOrOne: ZeroOrOne = 2; // no error!!

Version

As far I have work with enums I can not assing any literal value (Regarless the type...) so the error would be even this const zeroOrOne: ZeroOrOne = 1; as the literal value is not an enum value.

Perhaphs this is something you already know about, but I don't know and I think it is okey to report this here as an issue.

Thanks for reading... forgive me if I'm wrong in something.

Greetings.

Víctor.

[RyanCavanaugh]

https://stackoverflow.com/questions/53496711/number-enum-in-typescript-allows-any-number-whereas-string-enum-does-not

[RyanCavanaugh]

See #26362, etc

[vituchon]

Thanks @RyanCavanaugh for the quick answer. I see there is tradeoff here. Dificult chooise.. or you can have bitwise operations enums and strict enums, and everybody happy.