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---
order: 9
title:
zh-CN: 加载中状态
en-US: Loading
---
## zh-CN
添加 `loading` 属性即可让按钮处于加载状态,最后两个按钮演示点击后进入加载状态。
## en-US
A loading indicator can be added to a button by setting the `loading` property on the `Dropdown.Button`.
```jsx
import { Menu, Dropdown, Space } from 'antd';
import { DownOutlined } from '@ant-design/icons';
const menu = (
<Menu>
<Menu.Item key="1">Submit and continue</Menu.Item>
</Menu>
);
class App extends React.Component {
state = {
loadings: [],
};
enterLoading = index => {
const newLoadings = [...this.state.loadings];
newLoadings[index] = true;
this.setState({
loadings: newLoadings,
});
setTimeout(() => {
newLoadings[index] = false;
this.setState({ loadings: newLoadings });
}, 6000);
};
render() {
const { loadings } = this.state;
return (
<Space direction="vertical">
<Dropdown.Button type="primary" loading overlay={menu}>
Submit
</Dropdown.Button>
<Dropdown.Button type="primary" size="small" loading overlay={menu}>
Submit
</Dropdown.Button>
<Dropdown.Button
type="primary"
loading={loadings[0]}
overlay={menu}
onClick={() => this.enterLoading(0)}
>
Submit
</Dropdown.Button>
<Dropdown.Button
icon={<DownOutlined />}
loading={loadings[1]}
overlay={menu}
onClick={() => this.enterLoading(1)}
>
Submit
</Dropdown.Button>
</Space>
);
}
}
ReactDOM.render(<App />, mountNode);
```