如何编写无需修改原始函数即可扩展的JavaScript函数

function extendFunction(originalFunction, extensionFunction) {
  return function(...args) {
    originalFunction.apply(this, args);
    extensionFunction.apply(this, args);
  };
}

function original() {
  console.log("Original function");
}

function extension() {
  console.log("Extension function");
}

const extended = extendFunction(original, extension);
extended(); // 输出 "Original function" 和 "Extension function"

function decorator(originalFunction) {
  return function(...args) {
    console.log("Before original function");
    originalFunction.apply(this, args);
    console.log("After original function");
  };
}

function original() {
  console.log("Original function");
}

const decorated = decorator(original);
decorated(); // 输出 "Before original function"、"Original function" 和 "After original function"

function proxy(originalFunction) {
  return function(...args) {
    console.log("Before original function");
    originalFunction.apply(this, args);
    console.log("After original function");
  };
}

function original() {
  console.log("Original function");
}

const proxied = proxy(original);
proxied(); // 输出 "Before original function"、"Original function" 和 "After original function"