`koa-node-resolve` is a Koa middleware that rewrites bare Node‑style import specifiers in JavaScript (and HTML) files to relative paths pointing at the appropriate files in `node_modules`, so the code can run directly in browsers without a bundler. It’s aimed at developers who need a quick, build‑free way to serve ES modules during local development or test setups (e.g., with Karma), rather than for high‑traffic production servers.