Class Static

Static class methods are defined on the class itself, not on instances of the class.

Therefore, you can only call a static method on the class, not on an object instance.

Example

class Car {
constructor(name) {
    this.name = name;
  }
  static hello() {
    return “Hello!!”;
  }
}

const myCar = new Car(“Ford”);

// You can call ‘hello()’ on the Car Class:
document.getElementById(“demo”).innerHTML = Car.hello();

// But NOT on a Car Object:
// document.getElementById(“demo”).innerHTML = myCar.hello();
// this will raise an error.

To use the myCar object inside a static method, you can pass it as a parameter.

Example

class Car {
constructor(name) {
    this.name = name;
  }
  static hello(x) {
    return “Hello “ + x.name;
  }
}
const myCar = new Car(“Ford”);
document.getElementById(“demo”).innerHTML = Car.hello(myCar);