Sometimes, we want to get the keys of a TypeScript interface as array of strings.

In this article, we’ll look at how to get the keys of a TypeScript interface as array of strings.

How to get the keys of a TypeScript interface as array of strings?

To get the keys of a TypeScript interface as array of strings, we can use the keyof keyword.

For instance, we write

interface Person {
  name: string;
  age: number;
  location: string;
}

type Keys = keyof Person;

to create the Keys type by setting it to keyof Person.

keyof Person returns the literal type "name" | "age" | "location".

Conclusion

To get the keys of a TypeScript interface as array of strings, we can use the keyof keyword.