Express.js is the most used HTTP server and middleware platform for Node.js, effectively handling requests over the Internet—a testament to its enormous and lasting popularity.
Handling requests is one of the most common tasks in software development, and Express.js allows you to precisely define where requests come in and how responses are formulated.
To start an HTTP server using Express, you define a port for the server to listen on, allowing multiple services to run on the same machine with unique bindings.
The app.get function in Express corresponds to the HTTP GET method, executing a callback function whenever a GET request arrives at the defined path.
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