前端技术之：如何通过类的属性获取类名

 
class A {
  constructor(a, b = ‘bbb‘, c = 1) {
    this.a = a;
    this.b = b;
    this.c = c;
  }
}

const desc3 = Object.getOwnPropertyDescriptor(A.prototype, ‘constructor‘);
console.info(desc3);

{
  value: [Function: A],
  writable: true,
  enumerable: false,
  configurable: true
}
 

console.info(Object.getOwnPropertyDescriptors(desc3.value));

console.info(Object.getOwnPropertyDescriptors(A.prototype.constructor));

{
  length: {
    value: 1,
    writable: false,
    enumerable: false,
    configurable: true
  },
  prototype: {
    value: A {},
     writable: false,
     enumerable: false,
     configurable: false
  },
  name: {
    value: ‘A‘,
    writable: false,
    enumerable: false,
    configurable: true
  }
}

console.info(A.prototype.constructor.name);

console.info(undefined == new A().prototype);

const instance = new A();
const objProto = Object.getPrototypeOf(instance);
 
console.info(objProto === A.prototype);
console.info(Object.getOwnPropertyDescriptors(objProto));
console.info(Object.getOwnPropertyDescriptors(objProto.constructor));

true
{ constructor:
{ value: [Function: A],
writable: true,
enumerable: false,
configurable: true } }
{ length:
{ value: 1,
writable: false,
enumerable: false,
configurable: true },
prototype:
{ value: A {},
writable: false,
enumerable: false,
configurable: false },
name:
{ value: ‘A‘,
writable: false,
enumerable: false,
configurable: true } }

console.info(objProto.constructor.name);