How to add different Development Targets in Ionic project

Question

In iOS development, we can add different targets. Which help us to maintain 2-3 different project on same theme. Compiled target takes it's own resource file.

I have a project with different targets. Each target have different image-resources and different AppKeys for APIs. So I can use one project for maintaining different Apps.

I want to implement same thing on Ionic. Is there any way to do that?

Simply I want to make conditional resource allocation.

here's the example of iOS targets

Thanks in advance.