How type recursive object in typescript?

Question

I have next object

const obj = {
 name: 'First',
 age: 22,
}

This object has the next interface

interface ITask {
 name: string,
 age: number
}

but after some data mapping I create a recursive object like this

const obj = {
 name: 'First',
 age: 22,
 next: {
   name: 'Second',
   age: 12,
   next: { EMPTY OBJECT WHEN END }
 }
}

I try type this object this way, but it doesnt work

type IRecursiveTask =  {
        [key: string]: IRecursiveTask
} & ITask

Answer 1

type defines a type aliases, and type aliases cannot reference themselves. However, interface can.

interface IRecursiveTask {
  name: string;
  age: number;
  next: IRecursiveTask | {};
}