JUI
A react-web implementation of Intellij Platform
Pixel perfect UI match
Unless you inspect and see it's DOM elements, it's hard to tell what you are looking at is not the original Java implementation.
Intellij Platform's UX, React's DX
Amazing keyboard-first UX of Intellij Platform, in a descriptive and declarative style, which works great for UI applications.
Drop-in support for themes
All components respect and use theme properties like their corresponding Java implementation. You can use it with any theme in form of a json file and it works.
Demo Application
Bellow is an example application built with JUI. It mimics Webstorm, and although it has some functionality implemented as well, the main purpose is to show case features and components JUI offers, rather than being a real IDE.