打字稿类装饰器：重写构造函数，但保留类名称？

如何解决打字稿类装饰器：重写构造函数，但保留类名称？

打字稿手册中有一个示例，说明如何使用类装饰器覆盖构造函数（link）：

function classDecorator<T extends { new (...args: any[]): {} }>(
  constructor: T
) {
  return class extends constructor {
    newProperty = "new property";
    hello = "override";
  };
}

@classDecorator
class Greeter {
  property = "property";
  hello: string;
  constructor(m: string) {
    this.hello = m;
  }
}

当我注销结果类的实例时，该类名丢失：

console.log(new Greeter("world"));
//=> { "property": "property","hello": "override","newProperty": "new property" }

现在，如果我修改装饰器以将新类分配给变量，则日志将包含该变量的名称：

function classDecorator2<T extends { new (...args: any[]): {} }>(
  constructor: T
) {
  const MyDecoratedClass = class extends constructor {
    newProperty = "new property";
    hello = "override";
  };
  return MyDecoratedClass
}


@classDecorator2
class Greeter2 {
  // ... same as Greeter
}


console.log(new Greeter2("world"));
//=> MyDecoratedClass: { "property": "property","newProperty": "new property" } 

有没有一种方法可以在控制台输出中保留该类的原始名称？例如。我希望最后一个控制台语句的输出为

Greeter2: { "property": "property","newProperty": "new property" }

打字稿沙箱here中可用的所有代码示例

解决方法

您可以尝试这样的操作，虽然看起来有些怪异。

function classDecorator<T extends { new (...args: any[]): {} }>(
  constructor: T
) {
  const cls = class extends constructor {
    newProperty = "new property";
    hello = "override";
  };
  Object.defineProperty(cls,'name',{
    get: () => `${constructor.name}Generated`
  });
  return cls
}