unknown-example1.ts

{
  // ✨ All types are assignable to `unknown`.
  let unknownValue: unknown;
  let neverValue: never;
  let anyValue: any;

  // ✅
  unknownValue = 1;
  unknownValue = '1';
  unknownValue = {};
  unknownValue = neverValue;
  unknownValue = anyValue;
}

{
  // ✨ `unknown` can only be assigned to itself and `any`.
  let unknownValue: unknown;

  // ❌
  let numberValue: number = unknownValue;
  let stringValue: string = unknownValue;
  let objectValue: object = unknownValue;
  let neverValue: never = unknownValue;

  // ✅
  let unknownValue1: unknown = unknownValue;
  let anyValue: any = unknownValue;
}