How to define and use static methods using JavaScript Static

This article explains how to define and use static methods using JavaScript’s Static.

Understanding and mastering static methods allows for flexible operations in class definition and instance creation.

What are static methods?

Static methods are methods that can be called from the class itself, regardless of instantiation.

What is a static method?

A static method is a method defined within a class that can be called without creating an instance.

Such methods are useful when you want to perform certain processing within a class. By using static methods, you can clarify certain processing within a class.

How to define and use static methods

To define a static method, use the static keyword :

class Sample {
	static method() {
		console.log("This is a static method.");
	}
}

Sample.method(); // This is a static method.

A sample program using static methods is shown below.

class Circle {
  static calculateArea(radius) {
    return Math.PI * radius * radius;
  }
}

const circleArea = Circle.calculateArea(5);
console.log(circleArea);

In the above code, a static method called calculateArea is defined within the Circle class. This static method calculates the area of ​​a circle from the radius received as an argument.

When you run this sample code, you will find the area of ​​a circle with radius 5.

Static methods are defined within a class and can be called directly from the class name without creating an instance.

In what situations is it often used?

Static methods are used to easily perform common tasks within a class . For that purpose, you can define a function that does not need to be instantiated.

For example, create a function that adds numbers. This function does not need to be processed for a specific instance; it can be used throughout the class. You can use static methods to perform these common tasks.

By using static methods, you can easily grasp the data required when performing processing within a class, and you can also reduce the complex processing related to instance generation.

Summary of this article

We explained how to define and use static methods using Static.

It is very easy to understand that using static methods makes the class code simpler and the processing clearer!

Static methods can clarify certain processing within a class, so you can write more efficient code by using them.

Additionally, using static methods relieves the complexity of instantiation-related processing, making the developer’s task easier.