Basic Routing Fundamentals

Routing determines how a web application handles incoming requests based on the requested URL and HTTP method. Think of it like a traffic system, directing users to the right destination. For example, when someone visits http://example.com/welcome, the application must decide whether to display a web page or return data.

In Express.js, a route defines how an application processes incoming requests. A route consists of three key parts:

• Path (URL): This is the requested resource.

• HTTP method: This specifies the type of request (GET, POST, PUT, or DELETE) and the intended action (retrieving, creating, updating, or deleting data).

• Route handler: This function processes the request and sends a response.

Here is an example of a route that handles GET requests at the /welcome path and responds with 'Welcome to Express.js!'.