ant-design/components/spin/demo/tip.tsx

import React from 'react';
import { Alert, Spin } from 'antd';

const App: React.FC = () => (
  <Spin tip="Loading...">
    <Alert
      message="Alert message title"
      description="Further details about the context of this alert."
      type="info"
    />
  </Spin>
);

export default App;