Exploring Decorators and Classes in JavaScript: Enhancing Code Reusability

Learn How to Use Decorators to Extend and Modify Classes in JavaScript

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Decorators in JavaScript provide a powerful way to extend the functionality of classes and methods. Understanding how decorators work can significantly enhance code reusability and maintainability.

In this article, we’ll dive into the world of decorators and explore how they can be used with classes in JavaScript, accompanied by clear and practical examples.

Understanding Decorators

Decorators are functions that can be used to modify or enhance the behavior of classes and their members (such as methods and properties). They provide a flexible and declarative way to add functionality to existing code without modifying its underlying structure.

Using Decorators with Classes

Decorators can be applied to classes, methods, accessors, properties, or parameters using the @ syntax. Let's start with an example of a simple class decorator:

function Logger(target) {
  console.log('Logging...');
  console.log(target);
}

@Logger
class MyClass {
  // Class implementation
}