feature request: `oneOf` that allows you to check a value against multiple predicates about is

[sindresorhus]

Sounds useful.

I do wonder if we could change the existing any/all methods to support this use-case too.

Maybe if we change is.any(is.string, {}, true, '🦄'); to is.any([{}, true, '🦄'], is.string);, we could allow multiple inputs on each side:

is.any([{}, true, '🦄'], is.string);
is.any('🦄', [is.string, is.boolean]);

Thoughts? Other ideas?

[scraggo]

Adding it to .any like you’re suggesting works for me. Personally, I hesitated to overload it because I didn’t want there to be potential for confusion with how it already works. But the way you added it avoids a breaking change. :)

I’m not sure what the use case for .all is since a given input can only be one type, unless I’m mistaken!

If you decide it’s worthwhile, I’m happy to make a PR.

[sindresorhus]

Hmm, I don't think we actually need to change the order. We can just add an overload to is.any like this:

.any(predicates[], ...values)

is.any([is.string, is.number], {}, true, '🦄');
//=> true

is.any([is.boolean, is.number], 'unicorns', [], new Map());
//=> false

PR welcome for that.

[scraggo]

Sounds great to me 👍 - I'll have a PR hopefully shortly