why do we need static methods in class of javascript [duplicate]

Question

why do we need static methods in class of javascript.

class Car {
  constructor(brand) {
    this.carname = brand;
  }
  static hello(x) {
    return "Hello " + x.carname;
  }
}

mycar = new Car("Ford");

document.getElementById("demo").innerHTML = Car.hello(mycar);

I know that , Static methods are called directly on the class (Car from the example above) - without creating an instance/object (mycar) of the class. But what's the use of/point of static method in classes JS.

Answer 1

To be able to call the method without creating an instance of the class.

There's some benefit to this. To call an instance method, you would have to create a new instance of the class, and then call the method (it's a two-step process). With static methods, this isn't necessary.

More info here:

Static methods are often utility functions, such as functions to create or clone objects, whereas static properties are useful for caches, fixed-configuration, or any other data you don't need to be replicated across instances.

Static functions are typically referentially-transparent functions. A referentially-transparent function is one that doesn't rely on instance state for its proper functioning. Such a function is easy to reason about, because you don't have to consider anything that is happening outside of the function to understand what it does.