基本
默认值
可以自定义显示
移入展开
禁用选项
选择即改变
多选
自定义回填方式
大小
自定义已选项
搜索
动态加载选项
自定义字段名
扩展菜单
弹出位置
自定义状态
API

Cascader级联选择

级联选择框。

何时使用#

需要从一组相关联的数据集合进行选择，例如省市区，公司层级，事物分类等。
从一个较大的数据集合中进行选择时，用多级分类进行分隔，方便选择。
比起 Select 组件，可以在同一个浮层中完成选择，有较好的体验。

代码演示

Please select

基本

省市区级联。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

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

const App: React.FC = () => (
  <Cascader options={options} onChange={onChange} placeholder="Please select" />
);

export default App;

Unselect Change city

可以自定义显示

切换按钮和结果分开。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React, { useState } from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hangzhou',
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    children: [
      {
        value: 'nanjing',
        label: 'Nanjing',
      },
    ],
  },
];

const App: React.FC = () => {
  const [text, setText] = useState('Unselect');

  const onChange = (_: string[], selectedOptions: Option[]) => {
    setText(selectedOptions.map(o => o.label).join(', '));
  };

  return (
    <span>
      {text}
      &nbsp;
      <Cascader options={options} onChange={onChange}>
        <a href="#">Change city</a>
      </Cascader>
    </span>
  );
};

export default App;

禁用选项

通过指定 options 里的 disabled 字段。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hangzhou',
        children: [
          {
            value: 'xihu',
            label: 'West Lake',
          },
        ],
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    disabled: true,
    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} />;

export default App;

多选

一次性选择多个选项。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    label: 'Light',
    value: 'light',
    children: new Array(20)
      .fill(null)
      .map((_, index) => ({ label: `Number ${index}`, value: index })),
  },
  {
    label: 'Bamboo',
    value: 'bamboo',
    children: [
      {
        label: 'Little',
        value: 'little',
        children: [
          {
            label: 'Toy Fish',
            value: 'fish',
          },
          {
            label: 'Toy Cards',
            value: 'cards',
          },
          {
            label: 'Toy Bird',
            value: 'bird',
          },
        ],
      },
    ],
  },
];

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

const App: React.FC = () => (
  <Cascader
    style={{ width: '100%' }}
    options={options}
    onChange={onChange}
    multiple
    maxTagCount="responsive"
  />
);

export default App;

4.17.0

大小

不同大小的级联选择器。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

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

const App: React.FC = () => (
  <>
    <Cascader size="large" options={options} onChange={onChange} />
    <br />
    <br />
    <Cascader options={options} onChange={onChange} />
    <br />
    <br />
    <Cascader size="small" options={options} onChange={onChange} />
    <br />
    <br />
  </>
);

export default App;

Please select

搜索

可以直接搜索选项并选择。

Cascader[showSearch] 暂不支持服务端搜索，更多信息见 #5547

TypeScript
JavaScript
import { Cascader } from 'infrad';
import type { DefaultOptionType } from 'infrad/es/cascader';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hangzhou',
        children: [
          {
            value: 'xihu',
            label: 'West Lake',
          },
          {
            value: 'xiasha',
            label: 'Xia Sha',
            disabled: true,
          },
        ],
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    children: [
      {
        value: 'nanjing',
        label: 'Nanjing',
        children: [
          {
            value: 'zhonghuamen',
            label: 'Zhong Hua men',
          },
        ],
      },
    ],
  },
];

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

const filter = (inputValue: string, path: DefaultOptionType[]) =>
  path.some(
    option => (option.label as string).toLowerCase().indexOf(inputValue.toLowerCase()) > -1,
  );

const App: React.FC = () => (
  <Cascader
    options={options}
    onChange={onChange}
    placeholder="Please select"
    showSearch={{ filter }}
    onSearch={value => console.log(value)}
  />
);

export default App;

Please select

自定义字段名

自定义字段名。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

interface Option {
  code: string;
  name: string;
  items?: Option[];
}

const options: Option[] = [
  {
    code: 'zhejiang',
    name: 'Zhejiang',
    items: [
      {
        code: 'hangzhou',
        name: 'Hangzhou',
        items: [
          {
            code: 'xihu',
            name: 'West Lake',
          },
        ],
      },
    ],
  },
  {
    code: 'jiangsu',
    name: 'Jiangsu',
    items: [
      {
        code: 'nanjing',
        name: 'Nanjing',
        items: [
          {
            code: 'zhonghuamen',
            name: 'Zhong Hua Men',
          },
        ],
      },
    ],
  },
];

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

const App: React.FC = () => (
  <Cascader
    fieldNames={{ label: 'name', value: 'code', children: 'items' }}
    options={options}
    onChange={onChange}
    placeholder="Please select"
  />
);

export default App;

topLefttopRightbottomLeftbottomRight

Please select

弹出位置

可以通过 placement 手动指定弹出的位置。

TypeScript
JavaScript
import type { RadioChangeEvent } from 'infrad';
import { Cascader, Radio } from 'infrad';
import React, { useState } from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

const App: React.FC = () => {
  const [placement, SetPlacement] = useState<'bottomLeft' | 'bottomRight' | 'topLeft' | 'topRight'>(
    'topLeft',
  );

  const placementChange = (e: RadioChangeEvent) => {
    SetPlacement(e.target.value);
  };

  return (
    <>
      <Radio.Group value={placement} onChange={placementChange}>
        <Radio.Button value="topLeft">topLeft</Radio.Button>
        <Radio.Button value="topRight">topRight</Radio.Button>
        <Radio.Button value="bottomLeft">bottomLeft</Radio.Button>
        <Radio.Button value="bottomRight">bottomRight</Radio.Button>
      </Radio.Group>
      <br />
      <br />
      <Cascader options={options} placeholder="Please select" placement={placement} />
    </>
  );
};

export default App;

Zhejiang / Hangzhou / West Lake

默认值

默认值通过数组的方式指定。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

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

const App: React.FC = () => (
  <Cascader defaultValue={['zhejiang', 'hangzhou', 'xihu']} options={options} onChange={onChange} />
);

export default App;

移入展开

通过移入展开下级菜单，点击完成选择。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

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

// Just show the latest item.
const displayRender = (labels: string[]) => labels[labels.length - 1];

const App: React.FC = () => (
  <Cascader
    options={options}
    expandTrigger="hover"
    displayRender={displayRender}
    onChange={onChange}
  />
);

export default App;

选择即改变

这种交互允许只选中父级选项。

TypeScript
JavaScript
import { Cascader } from 'infrad';
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;

自定义回填方式

通过设置 ShowCheckedStrategy 选择回填方式。

TypeScript
JavaScript
import { Cascader } from 'infrad';

const { SHOW_CHILD } = Cascader;

interface Option {
  value: string | number;
  label: string;
  children?: Option[];
}
const options: Option[] = [
  {
    label: 'Light',
    value: 'light',
    children: new Array(20)
      .fill(null)
      .map((_, index) => ({ label: `Number ${index}`, value: index })),
  },
  {
    label: 'Bamboo',
    value: 'bamboo',
    children: [
      {
        label: 'Little',
        value: 'little',
        children: [
          {
            label: 'Toy Fish',
            value: 'fish',
          },
          {
            label: 'Toy Cards',
            value: 'cards',
          },
          {
            label: 'Toy Bird',
            value: 'bird',
          },
        ],
      },
    ],
  },
];

const App: React.FC = () => {
  const onChange = (value: string[][]) => {
    console.log(value);
  };
  return (
    <>
      <Cascader
        style={{ width: '100%' }}
        options={options}
        onChange={onChange}
        multiple
        maxTagCount="responsive"
        showCheckedStrategy={SHOW_CHILD}
        defaultValue={[
          ['bamboo', 'little', 'fish'],
          ['bamboo', 'little', 'cards'],
          ['bamboo', 'little', 'bird'],
        ]}
      />
      <br />
      <br />
      <Cascader
        style={{ width: '100%' }}
        options={options}
        onChange={onChange}
        multiple
        maxTagCount="responsive"
        defaultValue={['bamboo']}
      />
    </>
  );
};

export default App;

4.20.0

Zhejiang / Hangzhou / West Lake (752100)

自定义已选项

例如给最后一项加上邮编链接。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import type { DefaultOptionType } from 'infrad/es/cascader';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hangzhou',
        children: [
          {
            value: 'xihu',
            label: 'West Lake',
            code: 752100,
          },
        ],
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    children: [
      {
        value: 'nanjing',
        label: 'Nanjing',
        children: [
          {
            value: 'zhonghuamen',
            label: 'Zhong Hua Men',
            code: 453400,
          },
        ],
      },
    ],
  },
];

const handleAreaClick = (
  e: React.MouseEvent<HTMLAnchorElement>,
  label: string,
  option: DefaultOptionType,
) => {
  e.stopPropagation();
  console.log('clicked', label, option);
};

const displayRender = (labels: string[], selectedOptions: DefaultOptionType[]) =>
  labels.map((label, i) => {
    const option = selectedOptions[i];
    if (i === labels.length - 1) {
      return (
        <span key={option.value}>
          {label} (<a onClick={e => handleAreaClick(e, label, option)}>{option.code}</a>)
        </span>
      );
    }
    return <span key={option.value}>{label} / </span>;
  });

const App: React.FC = () => (
  <Cascader
    options={options}
    defaultValue={['zhejiang', 'hangzhou', 'xihu']}
    displayRender={displayRender}
    style={{ width: '100%' }}
  />
);

export default App;

动态加载选项

使用 loadData 实现动态加载选项。

注意：loadData 与 showSearch 无法一起使用。

TypeScript
JavaScript
import { Cascader } from 'infrad';
import React, { useState } from 'react';

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

const optionLists: Option[] = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    isLeaf: false,
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    isLeaf: false,
  },
];

const App: React.FC = () => {
  const [options, setOptions] = useState<Option[]>(optionLists);

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

  const loadData = (selectedOptions: Option[]) => {
    const targetOption = selectedOptions[selectedOptions.length - 1];
    targetOption.loading = true;

    // load options lazily
    setTimeout(() => {
      targetOption.loading = false;
      targetOption.children = [
        {
          label: `${targetOption.label} Dynamic 1`,
          value: 'dynamic1',
        },
        {
          label: `${targetOption.label} Dynamic 2`,
          value: 'dynamic2',
        },
      ];
      setOptions([...options]);
    }, 1000);
  };

  return <Cascader options={options} loadData={loadData} onChange={onChange} changeOnSelect />;
};

export default App;

Please select

扩展菜单

使用 dropdownRender 对下拉菜单进行自由扩展。

TypeScript
JavaScript
import { Cascader, Divider } from 'infrad';
import React from 'react';

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

const options: Option[] = [
  {
    value: 'zhejiang',
    label: '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',
          },
        ],
      },
    ],
  },
];

const dropdownRender = (menus: React.ReactNode) => (
  <div>
    {menus}
    <Divider style={{ margin: 0 }} />
    <div style={{ padding: 8 }}>The footer is not very short.</div>
  </div>
);

const App: React.FC = () => (
  <Cascader options={options} dropdownRender={dropdownRender} placeholder="Please select" />
);

export default App;

Error

Warning multiple

自定义状态

使用 status 为 Cascader 添加状态，可选 error 或者 warning。

TypeScript
JavaScript
import { Cascader, Space } from 'infrad';
import React from 'react';

const App: React.FC = () => (
  <Space direction="vertical">
    <Cascader status="error" placeholder="Error" />
    <Cascader status="warning" multiple placeholder="Warning multiple" />
  </Space>
);

export default App;

4.19.0

API#

<Cascader options={options} onChange={onChange} />

参数	说明	类型	默认值	版本
allowClear	是否支持清除	boolean	true
autoFocus	自动获取焦点	boolean	false
bordered	是否有边框	boolean	true
clearIcon	自定义的选择框清空图标	ReactNode	-
changeOnSelect	（单选时生效）当此项为 true 时，点选每级菜单选项值都会发生变化，具体见上面的演示	boolean	false
className	自定义类名	string	-
defaultValue	默认的选中项	string[] \| number[]	[]
disabled	禁用	boolean	false
displayRender	选择后展示的渲染函数	(label, selectedOptions) => ReactNode	label => label.join(`/`)	`multiple`: 4.18.0
dropdownClassName	自定义浮层类名	string	-	4.17.0
dropdownRender	自定义下拉框内容	(menus: ReactNode) => ReactNode	-	4.4.0
expandIcon	自定义次级菜单展开图标	ReactNode	-	4.4.0
expandTrigger	次级菜单的展开方式，可选 'click' 和 'hover'	string	`click`
fieldNames	自定义 options 中 label value children 的字段	object	{ label: `label`, value: `value`, children: `children` }
getPopupContainer	菜单渲染父节点。默认渲染到 body 上，如果你遇到菜单滚动定位问题，试试修改为滚动的区域，并相对其定位。示例	function(triggerNode)	() => document.body
loadData	用于动态加载选项，无法与 `showSearch` 一起使用	(selectedOptions) => void	-
maxTagCount	最多显示多少个 tag，响应式模式会对性能产生损耗	number \| `responsive`	-	4.17.0
maxTagPlaceholder	隐藏 tag 时显示的内容	ReactNode \| function(omittedValues)	-	4.17.0
notFoundContent	当下拉列表为空时显示的内容	string	`Not Found`
open	控制浮层显隐	boolean	-	4.17.0
options	可选项数据源	Option[]	-
placeholder	输入框占位文本	string	`请选择`
placement	浮层预设位置	`bottomLeft` `bottomRight` `topLeft` `topRight`	`bottomLeft`	4.17.0
showSearch	在选择框中显示搜索框	boolean \| Object	false
size	输入框大小	`large` \| `middle` \| `small`	-
status	设置校验状态	'error' \| 'warning'	-	4.19.0
style	自定义样式	CSSProperties	-
suffixIcon	自定义的选择框后缀图标	ReactNode	-
value	指定选中项	string[] \| number[]	-
onChange	选择完成后的回调	(value, selectedOptions) => void	-
onDropdownVisibleChange	显示/隐藏浮层的回调	(value) => void	-	4.17.0
multiple	支持多选节点	boolean	-	4.17.0
showCheckedStrategy	定义选中项回填的方式。`Cascader.SHOW_CHILD`: 只显示选中的子节点。`Cascader.SHOW_PARENT`: 只显示父节点（当父节点下所有子节点都选中时）。	`Cascader.SHOW_PARENT` \| `Cascader.SHOW_CHILD`	`Cascader.SHOW_PARENT`	4.20.0
removeIcon	自定义的多选框清除图标	ReactNode	-
searchValue	设置搜索的值，需要与 `showSearch` 配合使用	string	-	4.17.0
onSearch	监听搜索，返回输入的值	(search: string) => void	-	4.17.0
dropdownMenuColumnStyle	下拉菜单列的样式	CSSProperties	-

showSearch#

showSearch 为对象时，其中的字段：

参数	说明	类型	默认值
filter	接收 `inputValue` `path` 两个参数，当 `path` 符合筛选条件时，应返回 true，反之则返回 false	function(inputValue, path): boolean	-
limit	搜索结果展示数量	number \| false	50
matchInputWidth	搜索结果列表是否与输入框同宽（效果）	boolean	true
render	用于渲染 filter 后的选项	function(inputValue, path): ReactNode	-
sort	用于排序 filter 后的选项	function(a, b, inputValue)	-

Option#

interface Option {
  value: string | number;
  label?: React.ReactNode;
  disabled?: boolean;
  children?: Option[];
  // 标记是否为叶子节点，设置了 `loadData` 时有效
  // 设为 `false` 时会强制标记为父节点，即使当前节点没有 children，也会显示展开图标
  isLeaf?: boolean;
}

方法#

名称	描述	版本
blur()	移除焦点
focus()	获取焦点

注意，如果需要获得中国省市区数据，可以参考 china-division。