webpack-dev-server is a local web server designed to serve webpack bundles and trigger browser refreshes when source files change. It functions as a development environment that hosts bundled applications and provides a live reloading workflow.
The project distinguishes itself by supporting hot module replacement to update modules in a running application without a full page reload. It also acts as an HTTP proxy to redirect network request paths to different backends and provides history API fallbacks specifically for hosting single-page applications.
The server includes capabilities for monitoring file changes, serving static assets, and displaying compiler errors via browser-based overlays. It covers network configuration through HTTPS support, custom response headers, and host access restrictions, while offering automation for launching browsers and managing WebSocket communication.