版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery.ns-autogrow/1.1.6/jquery.ns-autogrow.js
- https://cdn.bootcdn.net/ajax/libs/jquery.ns-autogrow/1.1.6/jquery.ns-autogrow.min.js
Automatically adjust textarea height based on user input. Non-sucking version.