---
order: 1
title:
  zh-CN: 基本
---

## zh-CN

省市区级联。

- 添加类名 dt-ant-select-outside 为级联选择框设置统一样式

```jsx
import { Cascader } from 'antd';

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

function onChange(value) {
  console.log(value);
}

ReactDOM.render(
  <Cascader autoFocus className="dt-ant-select-outside" options={options} onChange={onChange} placeholder="Please select" />,
  mountNode,
);
```