methods

What are JavaScript Class Static Methods?

JavaScript class static methods are methods that are associated with a JavaScript class, rather than with individual instances of a class. Unlike instance methods (which are associated with individual class instances), static methods are “called” on the class itself, rather than on individual instances of the class. Static methods can be used to create utilities that can be used across various class instances without the need to create a new instance of the class.

How to Define a JavaScript Class Static Method

To define a JavaScript class static method, the syntax is as follows:

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class MyClass {
  // Define class body
  static myStaticMethod() {
    // Method body
  }
}

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Here, we have defined a static method named myStaticMethod on the MyClass class. Note that the static keyword is used to designate that the method is a static method.

Using Static Methods

Static methods can be called by using the class name, followed by the method name, as shown below:

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MyClass.myStaticMethod();

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Here, we have called the myStaticMethod() method on the MyClass class.

Static methods can also be used to create utility functions that can be used across various class instances, without the need to create a new instance of the class. For example, consider the following code:

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class MathUtils {
  static sum(a, b) {
    return a + b;
  }
}

let x = MathUtils.sum(1, 2);
console.log(x); // 3

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Here, we have defined a MathUtils class with a static method named sum(). This method takes two arguments, a and b, and returns their sum. This method can be used across various class instances without the need to create a new instance of the class. In the example above, we have called the sum() method and stored the result in a variable named x.

Conclusion

In conclusion, JavaScript class static methods are methods that are associated with a JavaScript class, rather than with individual instances of a class. They are defined using the static keyword, and can be called using the class name, followed by the method name. Static methods can be used to create utility functions that can be used across various class instances without the need to create a new instance of the class.