Typescript Guide: When should we explicitly assign the type of each property in a scenario where all properties are identical?

Imagine I have an object:

interface Name {
  first: string;
  middle: string;
  last: string;
  blah: string;
  blahblah: string;
}

It's clear that each property is a string type. Is there a way to reduce repetitive typing of "string"?

Answer №1

If you're looking for an alternative, consider using Record:

type PersonInfo = Record<
  | 'first'
  | 'middle'
  | 'last'
  | 'blah'
  | 'blahblah', string>

Try it out in the Playground

Answer №2

Titian consistently provides accurate answers, and it's worth noting that mapped types can also be utilized to attain the desired outcome:

type Name = {
  [key in 'first' | 'middle' | 'last' | 'other' | 'another']: string
};

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