How can one define a TypeScript function for the purpose of decoration?

edit

In TypeScript, a function can be decorated by using the '@' symbol and followed by the name of the decorator function. The decorator function can be defined as a regular function that takes in the target function as its argument and returns a new function that wraps the original function.

Here's an example of a decorator function that logs the name of the function being decorated:

function logFunction(targetFunc: Function) {
  const originalFunc = targetFunc;
  const funcName = originalFunc.name;

  targetFunc = function(...args: any[]) {
    console.log(`Function ${funcName} called with arguments ${args}`);
    return originalFunc.apply(this, args);
  }

  return targetFunc;
}

To use the decorator, apply it to the function you want to decorate:

@logFunction
function myFunction(arg1, arg2) {
  // function logic goes here
}

Now, every time myFunction is called, it will also log its name and arguments to the console.