micro

Export an async function that receives the request and response objects, then return a value which micro sends as the response. Run it with npx micro after installing the package with npm install micro.

Use the json() helper exported by micro: const body = await json(req). For plain text use text(req), and for raw binary data use buffer(req). Body parsing is explicit and never automatic.

No, micro is a single-endpoint server with no built-in routing. For multi-route services you need an external router such as micro-router, or a different framework entirely.

Use createError(statusCode, message) and throw the result inside your handler, for example throw createError(401, 'Unauthorized'). Micro catches thrown errors and converts them into proper HTTP error responses.

Wrap your handler with a higher-order function that modifies the request or response before calling the inner handler. For CORS, set the Access-Control-Allow-Origin header on the response and then delegate to the wrapped function.

micro-dev is the development companion for micro that provides hot-reloading during local development. Install it as a dev dependency and run npx micro-dev index.js instead of the production micro command.