nodejs 中的当前实例 class

Instanceof current class in nodejs

我想测试一个变量是否是当前 class 的一个实例。所以我正在检查 class 的方法。我希望有比指定 class 名称更抽象的方法。在 PHP 中,可以使用 self 关键字。

在PHP中是这样完成的:

if ($obj instanceof self) {

}

nodejs 中的等价物是什么?

考虑您的评论(强调我的):

I want to test if a variable is an instance of the current class. So I'm checking within a method of the class. And I was hoping there's a more abstract way of doing than specifying the class name. In PHP it's possible with the self keyword.

我会说 self 在这种情况下会映射到 this.constructor。考虑以下因素:

class Foo {}
class Bar {}
class Fizz {
  // Member function that checks if other 
  // is an instance of the Fizz class without 
  // referring to the actual classname "Fizz"
  some(other) {
    return other instanceof this.constructor;
  }
}

const a = new Foo();
const b = new Foo();
const c = new Bar();
const d = new Fizz();
const e = new Fizz();

console.log(a instanceof b.constructor); // true
console.log(a instanceof c.constructor); // false
console.log(d.some(a)); // false
console.log(d.some(e)); // true