Express is a routing and middleware web framework that has minimal functionality of its own: An Express application is essentially a series of middleware function calls.

Overview Middleware functions are functions that have access to the request object (req), the response object (res)

Overview Express 4 is a breaking change from Express 3, so. That means an existing Express 3 app will not work if you update

Overview This article discusses performance and reliability best practices for Express applications deployed to production

Use the app.engine(ext, callback) method to create your own template engine. ext refers to the file extension, and callback is the template