flags

Next.js feature flag management is achieved by wiring type declarations from config-shared.ts to config-schema.ts, then propagating them through define-env.ts and next-server.ts to ensure correct build-time and runtime injection across client and server bundles.

Build-time injection for Next.js runtime environments uses DefinePlugin variants and define-env.ts to wire flags, ensuring environment propagation across app and server routes without breaking deployments during pre-compiled runtime bundle generation.

Yes, you can enable an experimental Next.js feature behind a runtime toggle to test in production by adjusting config-shared.ts and next-runtime.webpack-config.js, allowing safe rollbacks if deployment issues arise.

Yes, adding a new Next.js feature flag requires updating config-shared.ts and config-schema.ts for wiring and validation, followed by adjustments to define-env.ts and related server files to activate the flag end-to-end.

Next.js feature flags can break deployments if environment propagation is incomplete, requiring updates to export/worker.ts and next-server.ts to ensure correct runtime behavior and bundle variants across app and server routes.