Interface for dynamic key in typescript

Question

I have an Object like this that is created by underscore\'s _.groupBy() method.

myObject = {
  \"key\" : [{Object},{Object2},{Object3}],
  \"key         


        

Answer 1

{ [x: string]: T }

and

Record

usually will serve for all your objectives. However, I got to a strange point where after some type operations the first option was returning to me both [x: string] and [x: number], and I wasn't being able to use the Record, as it was a recursive type operation and Typescript was throwing an error saying my recursive type wasn't generic.

So, studying the really small Record code, I came to this solution that solved my complex problem:

{ [P in string]: T }

Edit: I also usually have this in every Typescript code I write, in a utils.ts file:

export type obj = Record

Faster and cleaner than using the Record all the time.

E.g.:

type MyObjectType = {
  propA: obj; // An object with unknown props
  propB: obj; // An object with number props
}