lovablelabs/oj

README EXCERPT

OJ OJ is a Rust-native build tool for React apps. It optimizes for memory and cold start, where running many builds (CI, agents, multi-tenant) under Vite gets expensive. OJ is meant to run real production React apps without changes to their source. Server rendering There is an SSR mode: oj dev --ssr src/entry-server.tsx in dev, and oj build --ssr for production. It streams the HTML out with renderToReadableStream instead of buffering, and the client hydrates through the normal dev pipeline, so Fast Refresh and HMR keep working over a server-rendered page. In dev the server modules run in a small persistent Node process (a module runner using vm.SourceTextModule ) that re-evaluates only what changed, instead of rebuilding a bundle per request. Plugins Vite/Rollup-style plugins run through a persistent Node plugin host. Drop an oj.plugins.mjs at the app root that default-exports a plugin array, or let oj read an app's vite.config.{ts,js,mjs} and pick up its plugins array directly. A TypeScript config (including one that imports local .ts files) is loaded via Vite's own config loader when Vite is installed, or bundled with the app's esbuild otherwise. From a vite.config oj also adopts…

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