---
category: 2
title: Promise 接口
title_en: Promise interface
---

 zh-CN

可以通过 then 接口在关闭后运行 callback 。以上用例将在每个 message 将要结束时通过 then 显示新的 message 。

 en-US
`message` provides promise interface for `onClose`. The above example will display a new message when old message is about to finish.

````jsx
import { message, Button } from 'parkball';

const success = () => {
  message.loading('Action in progress..', 2.5)
    .then(() => message.success('Loading finished', 2.5))
    .then(() => message.info('Loading finished is finished', 2.5));
};

ReactDOM.render(
  <Button onClick={success}>Display a sequence of message</Button>,
  mountNode);
````