Basic
Default value
Custom trigger
Hover
Disabled option
Change on select
Multiple
ShowCheckedStrategy
Size
Custom render
Search
Load Options Lazily
Custom Field Names
Custom dropdown
Placement
Status
API

Cascader

Cascade selection box.

When To Use#

When you need to select from a set of associated data set. Such as province/city/district, company level, things classification.
When selecting from a large data set, with multi-stage classification separated for easy selection.
Chooses cascade items in one float layer for better user experience.

Examples

Please select

Basic

Cascade selection box for selecting province/city/district.

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

Custom trigger

Separate trigger button and result.

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;

Disabled option

Disable option by specifying the disabled property in options.

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;

Multiple

Select multiple options

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

Size

Cascade selection box of different sizes.

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

Search and select options directly.

Now, Cascader[showSearch] doesn't support search on server, more info #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

Custom Field Names

Custom field names.

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

Placement

You can manually specify the position of the popup via placement.

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

Default value

Specifies default value by an array.

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;

Hover

Hover to expand sub menu, click to select option.

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;

Change on select

Allow only select parent options.

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;

ShowCheckedStrategy

The way show selected item in box using ShowCheckedStrategy.

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)

Custom render

For instance, add an external link after the selected value.

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;

Load Options Lazily

Load options lazily with loadData.

Note: loadData cannot work with showSearch.

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

Custom dropdown

Customize the dropdown menu via dropdownRender.

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

Status

Add status to Cascader with status, which could be error or 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} />

Property	Description	Type	Default	Version
allowClear	Whether allow clear	boolean	true
autoFocus	If get focus when component mounted	boolean	false
bordered	Whether has border style	boolean	true
clearIcon	The custom clear icon	ReactNode	-
changeOnSelect	(Work on single select) Change value on each selection if set to true, see above demo for details	boolean	false
className	The additional css class	string	-
defaultValue	Initial selected value	string[] \| number[]	[]
disabled	Whether disabled select	boolean	false
displayRender	The render function of displaying selected options	(label, selectedOptions) => ReactNode	label => label.join(`/`)	`multiple`: 4.18.0
dropdownClassName	The additional className of popup overlay	string	-	4.17.0
dropdownRender	Customize dropdown content	(menus: ReactNode) => ReactNode	-	4.4.0
expandIcon	Customize the current item expand icon	ReactNode	-	4.4.0
expandTrigger	expand current item when click or hover, one of `click` `hover`	string	`click`
fieldNames	Custom field name for label and value and children	object	{ label: `label`, value: `value`, children: `children` }
getPopupContainer	Parent Node which the selector should be rendered to. Default to `body`. When position issues happen, try to modify it into scrollable content and position it relative. example	function(triggerNode)	() => document.body
loadData	To load option lazily, and it cannot work with `showSearch`	(selectedOptions) => void	-
maxTagCount	Max tag count to show. `responsive` will cost render performance	number \| `responsive`	-	4.17.0
maxTagPlaceholder	Placeholder for not showing tags	ReactNode \| function(omittedValues)	-	4.17.0
notFoundContent	Specify content to show when no result matches	string	`Not Found`
open	Set visible of cascader popup	boolean	-	4.17.0
options	The data options of cascade	Option[]	-
placeholder	The input placeholder	string	`Please select`
placement	Use preset popup align config from builtinPlacements	`bottomLeft` `bottomRight` `topLeft` `topRight`	`bottomLeft`	4.17.0
showSearch	Whether show search input in single mode	boolean \| Object	false
size	The input size	`large` \| `middle` \| `small`	-
status	Set validation status	'error' \| 'warning'	-	4.19.0
style	The additional style	CSSProperties	-
suffixIcon	The custom suffix icon	ReactNode	-
value	The selected value	string[] \| number[]	-
onChange	Callback when finishing cascader select	(value, selectedOptions) => void	-
onDropdownVisibleChange	Callback when popup shown or hidden	(value) => void	-	4.17.0
multiple	Support multiple or not	boolean	-	4.17.0
showCheckedStrategy	The way show selected item in box. `SHOW_CHILD`: just show child treeNode. `Cascader.SHOW_PARENT`: just show parent treeNode (when all child treeNode under the parent treeNode are checked)	`Cascader.SHOW_PARENT` \| `Cascader.SHOW_CHILD`	`Cascader.SHOW_PARENT`	4.20.0
removeIcon	The custom remove icon	ReactNode	-
searchValue	Set search value，Need work with `showSearch`	string	-	4.17.0
onSearch	The callback function triggered when input changed	(search: string) => void	-	4.17.0
dropdownMenuColumnStyle	The style of the drop-down menu column	CSSProperties	-
loadingIcon	The apparence of lazy loading (now is useless)	ReactNode	-

showSearch#

Property	Description	Type	Default
filter	The function will receive two arguments, inputValue and option, if the function returns true, the option will be included in the filtered set; Otherwise, it will be excluded	function(inputValue, path): boolean	-
limit	Set the count of filtered items	number \| false	50
matchInputWidth	Whether the width of list matches input, (how it looks)	boolean	true
render	Used to render filtered options	function(inputValue, path): ReactNode	-
sort	Used to sort filtered options	function(a, b, inputValue)	-

Option#

interface Option {
  value: string | number;
  label?: React.ReactNode;
  disabled?: boolean;
  children?: Option[];
  // Determines if this is a leaf node(effective when `loadData` is specified).
  // `false` will force trade TreeNode as a parent node.
  // Show expand icon even if the current node has no children.
  isLeaf?: boolean;
}

Methods#

Name	Description	Version
blur()	Remove focus
focus()	Get focus