Simultaneously design across a variety of themes and screen sizes powered by JSX and the Mesh component library.
Playroom is an incredibly powerful design tool created by the team at seek-oss.
Playroom allows you to quickly experiment with real Mesh components, real interactivity and real limitations of both the system and the web platform. By prototyping in the final medium you will be building within the capabilities of the system and not unknowingly straying from what's possible like you might in a traditional design tool.
Playroom's primary interface is a JSX editor which will be very familiar for developers and offers "Snippets" to drop in components like you would sketch symbols, which may be more approachable for designers.
Share your current state at any point by simply sharing the URL. Share with fellow designers for assistance and divergent iteration, share with your team for feedback and share with developers for streamlined developer handoff.