LESS.js Middleware for Connect/Express

less-middleware is an HTTP middleware specifically designed to process LESS CSS files for web servers built with Connect.js or Express.js. It compiles .less files into .css on-the-fly when requested, or upon server restart with caching, and serves the resulting CSS. The current stable version, 3.1.0, is compatible with Less.js 3.9. While not on a strict schedule, releases typically follow major Less.js updates to maintain compatibility and leverage new features. Its key differentiators include robust caching mechanisms (including `cacheFile` for cross-restart caching), extensive preprocessing and postprocessing hooks (`preprocess.less`, `postprocess.css`), and fine-grained control over rendering options, making it suitable for both development and production environments by reducing disk I/O.