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Table of Contents
Calling Static Methods in ES6 Classes
The Constructor Method
The Class Name Method
Choosing the Appropriate Method
Home Web Front-end JS Tutorial How Do Static Method Calls Behave in ES6 Classes with Inheritance?

How Do Static Method Calls Behave in ES6 Classes with Inheritance?

Nov 19, 2024 pm 05:04 PM

How Do Static Method Calls Behave in ES6 Classes with Inheritance?

Calling Static Methods in ES6 Classes

In ES6 classes, static methods can be invoked through two primary methods: via the constructor or the class name. However, these approaches differ in their behavior when it comes to inheritance scenarios with overridden static methods. Let's delve into the nuances.

The Constructor Method

Calling a static method through the constructor involves the following syntax:

this.constructor.methodName(arguments);

This method always references the static method defined in the constructor's class, regardless of any inheritance or overrides. This ensures that the static property's behavior remains static and always returns the value associated with the original class.

The Class Name Method

Static methods can also be invoked directly using the class name:

ClassName.methodName(arguments);

This approach references the static property defined in the current class. If the class has inherited the static property from a superclass, the static method will use dynamic dispatch and reference the class of the current instance. In other words, if the static property is overridden in the instance's class, the method will refer to the overridden version, while if it is not overridden, it will refer to the inherited version.

Choosing the Appropriate Method

The choice of which method to use depends on the desired behavior:

  • Static Property Will Not Be Overridden: If the static property is expected to remain static and always refer to the original class's value, the explicit reference via the constructor (this.constructor) is recommended.
  • Static Property May Be Overridden: If the static property may be overridden in subclasses and the method should refer to the current instance's class, using the class name (ClassName) is more appropriate.

Understanding the difference between these methods ensures proper handling of static methods in ES6 classes, especially in inheritance scenarios.

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