cloudflare / vinext

* feat: add CJS support via vite-plugin-commonjs Add vite-plugin-commonjs to handle require() and module.exports in both App Router and Pages Router. This enables CJS interop in server components and pages, including CJS require('server-only') boundary enforcement by @vitejs/plugin-rsc. - Add vite-plugin-commonjs as a dependency and register it in the plugin array - Add App Router fixtures: CJS basic, CJS server-only, CJS server-only violation (client component importing server-only module) - Add Pages Router fixture: CJS basic (require/module.exports) - Add integration tests for both routers (cjs.test.ts) - Add App Router e2e tests for CJS rendering and server-only boundary enforcement (tests/e2e/app-router/cjs.spec.ts) - Add Pages Router e2e test for CJS rendering (tests/e2e/pages-router/cjs.spec.ts) * fix: use buildViteConfig() for Pages Router production builds The Pages Router build path hardcoded plugins: [vinext()] in inline config, duplicating plugins when a vite.config.ts also registers vinext(). This caused double-transformation errors during production builds. Use buildViteConfig() instead, matching the App Router path which already handles this correctly. * fix: move server-only-violation fixture to isolated directory The server-only-violation fixture causes a fatal build error during production builds of app-basic (the RSC plugin rejects the intentional violation). This breaks unrelated tests in app-router.test.ts. Move the fixture to tests/fixtures/app-cjs-violation/ so it doesn't poison the shared app-basic production build. Remove the E2E test case since it requires the app-basic dev server; the server-only boundary enforcement for CJS require() is verified by the RSC plugin's build validation. * fix: address review feedback from bonk - Remove unused components/random.tsx (dead code, Pages Router CJS test uses pages/cjs/random.ts instead) - Add trailing newlines to fixture files - Move commonjs() plugin earlier in array (after tsconfigPaths, before vinext:config) so CJS->ESM transform runs before directive scanning - Tighten test assertions: use regex for 'Random:.*4' to be specific while handling React SSR comment nodes between text and expressions --------- Co-authored-by: Steve Faulkner <sfaulkner@cloudflare.com>