ant-design/components/layout/demo/fixed-sider.md

---
order: 7
iframe: 360
title:
  zh-CN: 固定侧边栏
  en-US: Fixed Sider
---

## zh-CN

当内容较长时，使用固定侧边栏可以提供更好的体验。

## en-US

When dealing with long content, a fixed sider can provide a better user experience.

```tsx
import {
  AppstoreOutlined,
  BarChartOutlined,
  CloudOutlined,
  ShopOutlined,
  TeamOutlined,
  UploadOutlined,
  UserOutlined,
  VideoCameraOutlined,
} from '@ant-design/icons';
import type { MenuProps } from 'antd';
import { Layout, Menu } from 'antd';
import React from 'react';

const { Header, Content, Footer, Sider } = Layout;

const items: MenuProps['items'] = [
  UserOutlined,
  VideoCameraOutlined,
  UploadOutlined,
  BarChartOutlined,
  CloudOutlined,
  AppstoreOutlined,
  TeamOutlined,
  ShopOutlined,
].map((icon, index) => ({
  key: String(index + 1),
  icon: React.createElement(icon),
  label: `nav ${index + 1}`,
}));

const App: React.FC = () => (
  <Layout hasSider>
    <Sider
      style={{
        overflow: 'auto',
        height: '100vh',
        position: 'fixed',
        left: 0,
        top: 0,
        bottom: 0,
      }}
    >
      <div className="logo" />
      <Menu theme="dark" mode="inline" defaultSelectedKeys={['4']} items={items} />
    </Sider>
    <Layout className="site-layout" style={{ marginLeft: 200 }}>
      <Header className="site-layout-background" style={{ padding: 0 }} />
      <Content style={{ margin: '24px 16px 0', overflow: 'initial' }}>
        <div className="site-layout-background" style={{ padding: 24, textAlign: 'center' }}>
          <p>long content</p>
          {
            // indicates very long content
            Array.from({ length: 100 }, (_, index) => (
              <React.Fragment key={index}>
                {index % 20 === 0 && index ? 'more' : '...'}
                <br />
              </React.Fragment>
            ))
          }
        </div>
      </Content>
      <Footer style={{ textAlign: 'center' }}>Ant Design ©2018 Created by Ant UED</Footer>
    </Layout>
  </Layout>
);

export default App;
```

```css
#components-layout-demo-fixed-sider .logo {
  height: 32px;
  margin: 16px;
  background: rgba(255, 255, 255, 0.2);
}
.site-layout .site-layout-background {
  background: #fff;
}
```

<style>
  [data-theme="dark"] .site-layout .site-layout-background {
    background: #141414;
  }
</style>