Validate if string is part of an array .oneOf(string[])

[SamVerschueren]

I had a use case where I needed to check if the input was a string and was part of an array. So it might be nice if we had a .in(list: string[]) predicate (or another name) which could cover this.

Example

const input = 'foo';

ow(input, ow.string.in(['foo', 'bar']));

[sindresorhus]

👍 Good idea

[poupryc]

Maybe change the name for enum ?

[SamVerschueren]

Why? Enums are not the same as arrays. Can you give an example?

[poupryc]

for me, enum refers to the possible value that can take the string. Or I did not fully understand the use cases of "is"

[transitive-bullshit]

I think enum would make more sense if it were the type, not the function. And since enums don't exist as a native type in JS, @SamVerschueren's OP suggestion seems the most consistent to me.

[SamVerschueren]

Exactly, enums are more a TS thing rather than a JS thing.

[poupryc]

Yes, it might be confused. "in" seems fine in this case ^^

[transitive-bullshit]

Alternatively, oneOf might be a little clearer and it follows react's prop-types naming.

ow(input, ow.string.oneOf(['foo', 'bar']));

[sindresorhus]

👍 oneOf