ReactUnity is a UI Framework for Unity, that lets you code in React and CSS. It runs this code inside a JavaScript engine and outputs Unity components to directly render them inside Unity. The goal of ReactUnity is to provide Unity developers a declarative way to build user interfaces, similar to web technologies like React and HTML.

Here is a sample Todo App to show off some React and CSS features of ReactUnity.

a collection of expressive, low-level visualization primitives for React