在javascript更新后获取新值

const inputField = document.getElementById('inputField');
inputField.addEventListener('input', function(event) {
  const newValue = event.target.value;
  console.log('新值：', newValue);
});

function updateValue(newValue) {
  console.log('新值：', newValue);
}

// 调用某个函数或方法，将回调函数作为参数传递
someFunction(updateValue);

class Observable {
  constructor() {
    this.observers = [];
  }

  addObserver(observer) {
    this.observers.push(observer);
  }

  notifyObservers(newValue) {
    this.observers.forEach(observer => observer.update(newValue));
  }
}

class Observer {
  update(newValue) {
    console.log('新值：', newValue);
  }
}

const observable = new Observable();
const observer = new Observer();

observable.addObserver(observer);
observable.notifyObservers('新值');