Nitro is a cross-platform server engine and JavaScript server framework designed to bundle backend code for deployment across diverse cloud providers, edge functions, and serverless environments. It functions as a platform-agnostic backend runtime that translates platform-specific event objects into a standardized request and response format.
The project utilizes a file-system based router to map the physical directory structure of the server folder directly to URL endpoints. It employs a build process to generate platform-agnostic bundles, ensuring the same server logic can run across different JavaScript runtimes without modifying the source code.
The framework provides a middleware-based request pipeline and a system for implementing API routes to handle network requests. It further optimizes deployments through static analysis code splitting to separate shared logic from route-specific code.