如何在reactjs中使用in方法更新状态

constructor(props) {
  super(props);
  this.state = {
    items: ['apple', 'banana', 'orange']
  };
}

updateState(value) {
  this.setState(prevState => {
    if (value in prevState.items) {
      // 值已存在，从数组中移除
      const updatedItems = prevState.items.filter(item => item !== value);
      return { items: updatedItems };
    } else {
      // 值不存在，添加到数组中
      const updatedItems = [...prevState.items, value];
      return { items: updatedItems };
    }
  });
}

render() {
  return (
    <div>
      <button onClick={() => this.updateState('apple')}>Add/Remove Apple</button>
      <button onClick={() => this.updateState('banana')}>Add/Remove Banana</button>
      <button onClick={() => this.updateState('orange')}>Add/Remove Orange</button>
    </div>
  );
}