相关疑难解决方法(0)

可以创建这样的DeepReadonly类型:

type DeepReadonly<T> = {
  readonly [P in keyof T]: DeepReadonly<T[P]>;
};

interface A {
  B: { C: number; };
  D: { E: number; }[];
}

const myDeepReadonlyObject: DeepReadonly<A> = {
  B: { C: 1 },
  D: [ { E: 2 } ],
}

myDeepReadonlyObject.B = { C: 2 }; // error :)
myDeepReadonlyObject.B.C = 2; // error :)

这很棒.这两个B和B.C是只读的.当我尝试修改D但是...

// I'd like this to be an error
myDeepReadonlyObject.D[0] = { E: …