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I am trying to create a static method that basically creates an instance of the class that made the call automatically.

In this example, I would like class A to create an instance of itself. How can this be done? The below code gives an error when executed.

class Model {
  static find(someVar) {
    let inst = new this.constructor[this.constructor.name]()
    // Do some extra stuff with the instance
    return inst
  }
}

class A extends Model { }

A.find()

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  • 3
    let inst = new this(); should work fine: jsfiddle.net/khrismuc/fu3jar8h Commented Aug 7, 2019 at 21:43
  • @ChrisG WOW didn't think it would be that easy... Commented Aug 7, 2019 at 21:43

1 Answer 1

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Every static method of a class has this context which points to the class after dot

class Model {
  static find(...args) {
    console.log("My name is", this.name) // <- this will print "My name is AModel"
    return new this(...args)
  }
}

class AModel extends Model { }

AModel.find(); // <- passing `this` context to be the AModel class.
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