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59 lines
1.3 KiB
Markdown
59 lines
1.3 KiB
Markdown
---
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order: 23
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title:
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zh-CN: 大数据
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en-US: Big Data
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---
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## zh-CN
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Select 使用了[虚拟滚动](https://github.com/react-component/virtual-list)技术，因而获得了比 [3.0 更好的性能](https://codesandbox.io/s/beautiful-banzai-m72lv)。
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## en-US
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Select use [virtual scroll](https://github.com/react-component/virtual-list) which get better performance [than 3.0](https://codesandbox.io/s/beautiful-banzai-m72lv).
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```jsx
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import { Select, Typography, Divider } from 'antd';
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const { Title } = Typography;
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const options = [];
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for (let i = 0; i < 100000; i++) {
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const value = `${i.toString(36)}${i}`;
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options.push({
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value,
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disabled: i === 10,
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});
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}
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function handleChange(value) {
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console.log(`selected ${value}`);
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}
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ReactDOM.render(
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<>
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<Title level={3}>Ant Design 4.0</Title>
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<Title level={4}>{options.length} Items</Title>
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<Select
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mode="multiple"
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style={{ width: '100%' }}
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placeholder="Please select"
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defaultValue={['a10', 'c12']}
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onChange={handleChange}
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options={options}
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/>
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<Divider />
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<Title level={3}>Ant Design 3.0</Title>
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<iframe
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title="Ant Design 3.0 Select demo"
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src="https://codesandbox.io/embed/solitary-voice-m3vme?fontsize=14&hidenavigation=1&theme=dark&view=preview"
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style={{ width: '100%', height: 300 }}
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/>
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</>,
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mountNode,
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);
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```
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