import { WhiteSpace, WingBlank, Button } from 'antd-mobile';const WhiteSpaceExample = React.createClass({  render() {    return (      <div className="button-container">        <WhiteSpace size="xs" />        <WingBlank>          <Button type="primary">上下留白xs</Button>        </WingBlank>        <WhiteSpace size="xs" />        <div style={{ borderTop: '1Px solid #108ee9' }} />        <WhiteSpace size="sm" />        <WingBlank>          <Button type="primary">上下留白sm</Button>        </WingBlank>        <WhiteSpace size="sm" />        <div style={{ borderTop: '1Px solid #108ee9' }} />        <WhiteSpace />        <WingBlank>          <Button type="primary">上下留白md(默认)</Button>        </WingBlank>        <WhiteSpace />        <div style={{ borderTop: '1Px solid #108ee9' }} />        <WhiteSpace size="lg" />        <WingBlank>          <Button type="primary">上下留白lg</Button>        </WingBlank>        <WhiteSpace size="lg" />        <div style={{ borderTop: '1Px solid #108ee9' }} />        <WhiteSpace size="xl" />        <WingBlank>          <Button type="primary">上下留白xl</Button>        </WingBlank>        <WhiteSpace size="xl" />        <div style={{ borderTop: '1Px solid #108ee9' }} />      </div>    );  },});ReactDOM.render(<WhiteSpaceExample />, mountNode);