隐藏打字稿类到对象

Question

我有一个打字稿 A 类和另一个 B 类具有 A 类的所有属性。有没有办法将所有值从 B 类复制到 A 类。或者有没有办法将 A 类的所有属性作为对象获取。

Answer 1

Class instances are objects, as such you can use normal object prototype functions ex.

 class MyClass { _a=0; _b=0; constructor(a, b){ this._a=a; this._b=b; } set a(a){ return this._a = a; } get a(){ return this._a; } set b(b){ return this._b = b; } get b(){ return this._b; } } const instance = new MyClass(2,3); console.log("keys", Object.keys(instance)) console.log("values", Object.values(instance)) console.log("entries", Object.entries(instance)) instance.a = 5; instance.b = 5; console.log("keys", Object.keys(instance)) console.log("values", Object.values(instance)) console.log("entries", Object.entries(instance))

Take into account that it will only return actual parameters, and ignore setters and getters

Answer 2

I don't really understand the question. If you need to copy all field values from class 1 to class 2, you can use:

Object.assign(cl2, cl1);

Here is full example ( can test it here , just press "Run"):

class Class1 {
    public a: number = 1;
    public b: number = 2;
    public c: number = 3;
};

class Class2 {
    public a?: number;
    public b?: number;
    public c?: number;
};

let cl1 = new Class1;
console.log('1 = ', cl1, cl1 instanceof Class1, cl1 instanceof Class2)

let cl2: Class2 = new Class2;
Object.assign(cl2, cl1);

console.log('2 = ', cl2, cl2 instanceof Class1, cl2 instanceof Class2);