Well, it's only the demo that's in TypeScript. The demo is just a fancy UI that takes the Rust-produced vertex and index buffers and uploads them to the GPU for

Well, it's only the demo that's in TypeScript. The demo is just a fancy UI that takes the Rust-produced vertex and index buffers and uploads them to the GPU for rendering. Ideally, I don't want to have to any code duplication between the Rust WebRender and Pathfinder demo code. That said, Rust on the server and TypeScript on the client go really well together. Strong typing everywhere!