express routing

To understand Express routing and its steps, let's break it down:

  1. Importing the Express module: In order to use Express routing, you need to import the Express module by adding the following line of code at the top of your file: javascript const express = require('express');

  2. Creating an instance of the Express application: After importing the Express module, you need to create an instance of the Express application by calling the express function and assigning it to a variable, like this: javascript const app = express();

  3. Defining routes: Express routing involves defining routes for different endpoints in your application. Each route consists of an HTTP method (such as GET, POST, PUT, DELETE) and a URL pattern. Here's an example of defining a route for the '/users' endpoint with the GET method: javascript app.get('/users', (req, res) => { // Route handler logic goes here });

  4. Handling route requests: Once you have defined your routes, you need to provide a route handler function that will be executed when a request is made to that specific route. The route handler function takes two parameters: the request object (req) and the response object (res). Here's an example of a route handler function: javascript app.get('/users', (req, res) => { // Route handler logic goes here res.send('This is the /users endpoint'); });

  5. Starting the server: After defining your routes and route handlers, you need to start the Express server so that it can listen for incoming requests. This is done by calling the listen method on the Express application and specifying the port number to listen on. Here's an example: javascript app.listen(3000, () => { console.log('Server started on port 3000'); });

These are the basic steps involved in setting up Express routing. Of course, there are many more advanced features and functionalities that you can explore, but this should give you a good starting point. Happy coding!