I have a common need to omit key-values pairs based on the value, for instance removing undefined or null values from an object, similar to this Stack Overflow question.
It would be cool if there were a type that could easily be used that behaved like so:
type Foo = { foo: number | null, bar?: string, baz: undefined };
type WithoutUndefined = OmitValues<Foo, undefined> // { foo: number | null, bar: string } # NOTE: I think it should remove optionality in this case, but maybe that's subjective
type WithoutUndefinedOrNull = OmitValues<Foo, undefined | null> // { foo: number, bar: string }
type WithoutNumbers = OmitValues<Foo, number> // { foo: null, bar?: string, baz: undefined }
sindresorhus / type-fest
A collection of essential TypeScript types
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