typescript keys from one interface and value as another type

Question

I have a interface

interface User {
    firstName: string;
    secondName: string;
    age: number;
}

I wanted to create a new type with different value type

type CustomT = { regex: RegExp }
interface UserWithRegexp {
    firstName: CustomT;
    secondName: CustomT;
    age: CustomT;
}

How can i refractor the UserWithRegexp type by using the User interface

I am expecting to have something like thistype UserWithRegexp = { [key of User] : CustomT }

Chris Gilardi · Accepted Answer · 2021-06-21 19:39:18Z

1

How about using the Record<K, V> type?

type UserWithRegexp = Record<keyof User, CustomT>;

You should be able to use it like this.

const userWithRegex: UserWithRegexp = {
    firstName: { regex: /.*/ },
    secondName: { regex: /.*/ },
    age: { regex: /.*/ },
};

answered Jun 21, 2021 at 19:39

Chris Gilardi

1,54115 silver badges28 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

jcalz Over a year ago

You may want to note that the Record utility type is defined similarly to what the OP is asking for: type UserWithRegexp = { [key in keyof User] : CustomT }

Collectives™ on Stack Overflow

typescript keys from one interface and value as another type

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related