ant-design/components/alert/demo/closable.tsx

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

const onClose = (e: React.MouseEvent<HTMLButtonElement, MouseEvent>) => {
  console.log(e, 'I was closed.');
};

const App: React.FC = () => (
  <Space direction="vertical" style={{ width: '100%' }}>
    <Alert
      message="Warning Text Warning Text Warning TextW arning Text Warning Text Warning TextWarning Text"
      type="warning"
      closable
      onClose={onClose}
    />
    <Alert
      message="Error Text"
      description="Error Description Error Description Error Description Error Description Error Description Error Description"
      type="error"
      closable
      onClose={onClose}
    />
  </Space>
);

export default App;