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