ExpressJS
Build fast, scalable APIs and web apps with Express.js, the minimalist Node.js framework
À propos de ExpressJS
Express.js is a lightweight, flexible Node.js framework optimized for rapid development. It offers routing, middleware support, and HTTP utilities while maintaining high performance and seamless integration with Node.js core features.
FAQ
Express does not enforce any specific structure. You can organize routes and application logic in any way that suits your needs, using any directory structure you prefer. Examples like route listings, route maps, and MVC-style controllers can serve as inspiration.
Express itself does not include database functionality. You need to use third-party Node modules to interface with databases. For a framework that integrates models with Express, consider LoopBack.
Express does not impose any specific authentication scheme. You can implement any authentication method you prefer, such as a simple username/password system, as shown in the provided examples.
Express supports any template engine that follows the (path, locals, callback) signature. For better compatibility and caching, you can use the consolidate.js project. Some unlisted engines may still work with Express.
404 responses are not captured by error-handling middleware. To handle them, add a middleware function at the end of the stack that sends a 404 response, such as: app.use((req, res, next) => { res.status(404).send('Sorry can't find that!') }).
Error-handling middleware is defined with four arguments: (err, req, res, next). An example is: app.use((err, req, res, next) => { console.error(err.stack); res.status(500).send('Something broke!') }).
Express 4.x requires Node.js 0.10 or higher. Express 5.x requires Node.js 18 or higher.
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