Hi, @Lokesh_Rana
Thanks for your interest!
We don't have exact requirements or even a specific example we'd like to see emulated. The exciting part of this project is that we're looking for new ideas and approaches to collaborate on. The descriptions are intentionally broad to allow folks creativity. However, we have come across some concepts that we've found interesting or potentially useful.
https://react-live.netlify.com/ has great flexibility, which could pair nicely with EUI.
https://github.com/elastic/eui/pull/2728 has some existing work on a more full-featured integration with codesandbox.io.
https://github.com/storybookjs/storybook/tree/master/addons/knobs , although we have no plans to use Storybook, highlights a good case of structured, intentional prop toggling in a simple UI.
The real goal is to allow users a quick but powerful way to start exploring component changes in EUI, in the browser and without needing to spin up a sample project. We're open to ideas that help us get to that goal.