How to create a TypeScript class decorator

In TypeScript, a class decorator is a function that is applied to a class declaration. Class decorators are declared just before the class declaration. Here's a simple example of how you can create a class decorator:

typescriptCopy code
// Class decorator function
function myClassDecorator(target: any) {
  // You can modify or extend the class here
  console.log(`Class Decorator called on: ${target.name}`);
}

// Applying the class decorator to a class
@myClassDecorator
class MyClass {
  // Class implementation
  constructor() {
    console.log("Class instantiated");
  }
}

// Creating an instance of the decorated class
const myInstance = new MyClass();

In this example, the myClassDecorator function is a class decorator that simply logs the name of the decorated class when it is applied. The @myClassDecorator syntax is used to apply the decorator to the MyClass declaration.

You can modify the class or perform other actions within the class decorator function. The target parameter of the decorator function refers to the constructor function of the class being decorated.

Remember that the order of execution of decorators is from the bottom to the top. If multiple decorators are applied, the one at the bottom will be executed first.

Feel free to customize the myClassDecorator function according to your specific needs.