ant-design/components/back-top/demo/custom.md

---
order: 1
title:
  zh-CN: 自定义样式
  en-US: Custom style
---

## zh-CN

可以自定义回到顶部按钮的样式，限制宽高：`40px * 40px`。

## en-US

You can customize the style of the button, just note the size limit: no more than `40px * 40px`.


````jsx
import { BackTop } from 'antd';

ReactDOM.render(
  <div>
    <BackTop>
      <div className="ant-back-top-inner">UP</div>
    </BackTop>
    Scroll down to see the bottom-right
    <strong style={{ color: '#57c5f7' }}> blue </strong>
    button.
  </div>,
  mountNode
);
````

````css
#components-back-top-demo-custom .ant-back-top {
  bottom: 100px;
}
#components-back-top-demo-custom .ant-back-top-inner {
  height: 40px;
  width: 40px;
  line-height: 40px;
  border-radius: 4px;
  background-color: #57c5f7;
  color: #fff;
  text-align: center;
  font-size: 20px;
}
````