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

order	title
2	zh-CN en-US 可关闭的警告提示 Closable

zh-CN

显示关闭按钮，点击可关闭警告提示。

en-US

To show close button.

import { Alert } from 'antd';

const onClose = function (e) {
  console.log(e, 'I was closed.');
};

ReactDOM.render(<div>
  <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}
  />
</div>, mountNode);