ant-design/components/checkbox/demo/check-all.md
2022-05-21 22:14:15 +08:00

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---
order: 4
title:
zh-CN: 全选
en-US: Check all
---
## zh-CN
在实现全选效果时,你可能会用到 `indeterminate` 属性。
## en-US
The `indeterminate` property can help you to achieve a 'check all' effect.
```tsx
import { Checkbox, Divider } from 'antd';
import type { CheckboxChangeEvent } from 'antd/es/checkbox';
import type { CheckboxValueType } from 'antd/es/checkbox/Group';
import React, { useState } from 'react';
const CheckboxGroup = Checkbox.Group;
const plainOptions = ['Apple', 'Pear', 'Orange'];
const defaultCheckedList = ['Apple', 'Orange'];
const App: React.FC = () => {
const [checkedList, setCheckedList] = useState<CheckboxValueType[]>(defaultCheckedList);
const [indeterminate, setIndeterminate] = useState(true);
const [checkAll, setCheckAll] = useState(false);
const onChange = (list: CheckboxValueType[]) => {
setCheckedList(list);
setIndeterminate(!!list.length && list.length < plainOptions.length);
setCheckAll(list.length === plainOptions.length);
};
const onCheckAllChange = (e: CheckboxChangeEvent) => {
setCheckedList(e.target.checked ? plainOptions : []);
setIndeterminate(false);
setCheckAll(e.target.checked);
};
return (
<>
<Checkbox indeterminate={indeterminate} onChange={onCheckAllChange} checked={checkAll}>
Check all
</Checkbox>
<Divider />
<CheckboxGroup options={plainOptions} value={checkedList} onChange={onChange} />
</>
);
};
export default App;
```