Koa Static File Server

Koa-static is a middleware for the Koa web framework designed to efficiently serve static files such as HTML, CSS, JavaScript, images, and other assets. It acts as a wrapper around `koa-send`, providing a streamlined interface for common static file serving patterns. The current stable version is 5.0.0. This package is mature and stable, with infrequent releases (v5.0.0 published 8 years ago), indicating a solid and well-understood functionality rather than rapid ongoing development. Key features include comprehensive caching controls via `maxage`, support for serving hidden files, configurable default index filenames (e.g., `index.html`), and automatic Gzip/Brotli compression where supported by the client. It also offers a `defer` option to allow other middleware to handle requests first and the ability to set custom response headers. Its primary differentiator is its deep integration and idiomatic usage within the Koa ecosystem, offering a lightweight and unopinionated approach compared to more feature-rich alternatives like `koa-static-cache` which offer in-memory caching or complex routing extensions.