ant-design/components/tabs/index.jsx

import Tabs from 'rc-tabs';
import React from 'react';
const prefixCls = 'ant-tabs';

class AntTabs extends React.Component {
  render() {
    let className = (this.props.className || '');
    let animation = this.props.animation;
    if (this.props.size === 'small' || this.props.size === 'mini') {
      className += ' ' + prefixCls + '-mini';
    }
    if (this.props.tabPosition === 'left' || this.props.tabPosition === 'right') {
      className += ' ' + prefixCls + '-vertical';
      animation = null;
    }
    return <Tabs {...this.props} className={className} animation={animation}/>;
  }
}

AntTabs.defaultProps = {
  prefixCls: prefixCls,
  size: 'default',
  animation: 'slide-horizontal',
};

AntTabs.TabPane = Tabs.TabPane;

export default AntTabs;