ant-design/components/badge/demo/overflow.md

order	title
6	封顶数字

超过 overflowCount 的会显示为 ${overflowCount}+。

import { Badge } from 'antd';

ReactDOM.render(<div>
  <Badge count={99} overflowCount={10}>
    <a href="#" className="head-example"></a>
  </Badge>
  <Badge count={1000} overflowCount={999}>
    <a href="#" className="head-example"></a>
  </Badge>
</div>, mountNode);