ant-design/components/cascader/demo/change-on-select.md

---
order: 5
title:
  zh-CN: 选择即改变
  en-US: Change on select
---

## zh-CN

这种交互允许只选中父级选项。

## en-US

Allow only select parent options.

```tsx
import { Cascader } from 'antd';
import React from 'react';

interface Option {
  value: string;
  label: string;
  children?: Option[];
}

const options: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hanzhou',
        children: [
          {
            value: 'xihu',
            label: 'West Lake',
          },
        ],
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    children: [
      {
        value: 'nanjing',
        label: 'Nanjing',
        children: [
          {
            value: 'zhonghuamen',
            label: 'Zhong Hua Men',
          },
        ],
      },
    ],
  },
];

const onChange = (value: string[]) => {
  console.log(value);
};

const App: React.FC = () => <Cascader options={options} onChange={onChange} changeOnSelect />;

export default App;
```