ant-design/site/theme/template/Content/Demo/CodePreview.jsx

import React from 'react';
import { Tabs } from 'antd';

const { TabPane } = Tabs;

const LANGS = {
  tsx: 'TypeScript',
  jsx: 'JavaScript',
};

const CodePreview = ({ toReactComponent, codes }) => {
  const langList = Object.keys(codes).sort().reverse();

  let content;

  if (langList.length === 1) {
    content = toReactComponent([
      'pre',
      {
        lang: langList[0],
        highlighted: codes[langList[0]],
      },
    ]);
  } else {
    content = (
      <Tabs>
        {langList.map(lang => (
          <TabPane tab={LANGS[lang]} key={lang}>
            {toReactComponent([
              'pre',
              {
                lang,
                highlighted: codes[lang],
              },
            ])}
          </TabPane>
        ))}
      </Tabs>
    );
  }

  return <div className="highlight">{content}</div>;
};

export default CodePreview;