hono-routing

Type-safe APIs with Hono routing involve defining routes with zValidator for request validation, exporting AppType for RPC client inference, and using middleware composition. Hono supports Cloudflare Workers, Deno, Bun, and Node.js, enabling full end-to-end type safety across client and server.

Yes. Hono's zValidator hook integrates with Zod, Valibot, Typia, and ArkType for request validation. This ensures incoming data conforms to your schema and provides typed access to validated request bodies, query parameters, and headers.

Hono RPC exports your AppType server definition to the client, automatically inferring route types, request shapes, and response types. This eliminates manual type duplication and catches type mismatches at compile time across the network boundary.

Hono error handling uses HTTPException for structured error responses and onError hooks for centralized error processing. This pattern ensures consistent error formats, proper HTTP status codes, and typed error metadata across all routes.

Extend Hono context using middleware to attach custom data via c.set and retrieve it with c.get. This enables typed access to request-scoped values like authentication state, database connections, or request IDs across nested route handlers.

Yes. Hono supports both built-in and custom middleware composition, route grouping with shared prefixes, route parameters, and wildcards. Middleware chains apply to specific routes or groups, enabling modular concerns like authentication, logging, and CORS.