Express.js is a back-end Node.js web framework used for building REST APIs, web servers, and middleware-driven server applications. It handles HTTP routing, request and response processing, and middleware composition on the server side. Express has no front-end role - browser-side JavaScript is handled by separate frameworks. Express.js is the most widely deployed Node.js back-end framework and the foundation for many higher-level frameworks including NestJS and Fastify.
Related Express.js Questions And Answers
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