Thank you for contacting us. I'll separate your question in two parts.
- in case you want to use calendar, just use input element with type "date" in your html:
Mobile devices display a calendar/date selector automatically when there is such element.
- adding plugin - when you want to add some plugins in your application, I would suggest you to use our AppBuilder CL
I. You can find information how to install it in our documentation
. After you have installed it, open command prompt / terminal and navigate to your project directory. For example in case your project is inside directory ~/myProjects/Proj1 execute $ cd ~/myProjects/Proj1
After that in the terminal you can write:
$ appbuilder plugin --available
This will list the available plugins that you can install in your project.
In case you want to add any of them to your project, just execute $ appbuilder plugin add <plugin name>
Hope this helps. Feel free to contact us in case you have any other problems or concerns.