modal能否加一个弹出多个窗口的功能

[chenmonkey]

• [ ] I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

modal能否加一个弹出多个窗口的功能，有时需要对照一下内容，比如对于定单页面，我需要同时打开多个定单页面进行对比，或者不同模块之间，打开弹窗进行对照

类似于layui中的layer弹出层 http://layer.layui.com/

What does the proposed API look like?

希望能增加一个参数设置这样的功能

[github-actions[bot]]

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