如何在Typescript（Angular）中将类型实现为对象的值

Question

I'd like to implement type to object's value. The problem is that target object has to have another type. The object is Angular's Router.

What I want to do is.

const object: Type = [{ // <-- I have to use Type here.
  otherkey: value,
  data: { // <-- I want to implement type here.
   a: 1,
   b: 'hello'
     }
}]

interface TypeForData {
   a: number;
   b: string;
}
----------------------
// in library's .d.ts file
export declare Type{
  otherkey: ...;
  [data: string]:any;
}[]

I tried these solution.

1. extend Type.
2. cast value(object).

1.extend Type

import { Type } from 'somewhere'
interface TypeForData extends Type{
    a: number;
    b: string;
}[]
then implement to variable. but doesn't work well.

2.cast value(object).

const object: Type = [{ 
  otherkey: value,
  data: <TypeForData> { 
   a: 1,
   b: 'hello'
     }
}]
but CLI doesn't show error even I assign different type value.

I'm really happy if I could get solution. Thank you.

Answer 1

You can try this.

interface TypeForData {
   a: number;
   b: string;
}

var someData: TypeForData;

var obj = {
    someData
};