Question 296280 in Javascript Question posted in
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without constructor, is there a way to get child class name in JavaScript?

I have a class A and a child class B . now i want to print child class name from a static method of parent class. but both of them doesn’t use constructor or new keyword.

Class A {
  static run() {
    console.log("child class name");
  }
}

class B extends A {}

B.run();

B.run() returning the Class name of B

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2

Answers


  1. 0

    Checking the prototype is one possible way?

    class A {
  static run() {
  console.log(this.prototype instanceof A ? 'B' : 'A');
  }
}

class B extends A {}

B.run();
A.run();
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  2. 0

    I’m not sure i’ve really understood your question, let me know if i’m wrong..

    You could simply use this.name (in the A class) to make B.run returns "B"
    As following :

    class A {
  static run() {
    console.log(this.name);
  }
}

class B extends A {}

A.run();
B.run();

    this.name is available because we’re in a static context, in a non-static method you would’ve use this.constructor.name ..

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