hm-react-cli/template/app/src/components/BackTop.js

Create a Huimei React project by module

import { BackTop } from 'antd';

const style = {
    height: 40,
    width: 40,
    lineHeight: '40px',
    borderRadius: 4,
    backgroundColor: '#57c5f7',
    color: '#fff',
    textAlign: 'center',
    fontSize: 20
};

export default function () {
    return (
        <div style={{height:'2000px'}}>
            <BackTop style={{ bottom: 100 }}>
                <div style={style}>UP</div>
            </BackTop>
            向下滚动后，见右下角蓝色按钮
        </div>
    );
}