Make sure that string is key interface-CodePudding

I have an interface like this

interface Cat {
    color: string,
    weight: number,
    cute: Boolean, // eventhough all cats are cute!
}

Now, I have to do something like this

const kitten: Cat = ...
Object.keys(kitten).some(prop => ['weight', 'color'].includes(prop)

Is there a way to make sure, that the strings passed to the array (['weight', 'color']) are part of the interface Cat?

CodePudding user response：

const arr: (keyof Cat)[] = ["weight", "color"]
Object.keys(kitten).some(prop => arr.includes(prop)

or for typescript 4.9 or higher

Object.keys(kitten).some(prop => (['weight', 'color'] satisfies (keyof Cat)[]).includes(prop))

to bypass Object.keys error.

type ObjectKeys<T> = (keyof T)[];
(Object.keys(kitten) as ObjectKeys<Cat>).some(prop => (['weight', 'color'] satisfies (keyof Cat)[]).includes(prop))