These are derived from HTTP verbs or HTTP methods. A route method is used to define the response that an application will have for a specific HTTP verb.

ExpressJS route methods have equivalent names to HTTP verbs. For instance: app.get() for the GET HTTP verb or app.delete() for the DELETE HTTP verb.

A very basic route can be written as the following:

1. Create a new file named 1-basic-route.js
2. Include the ExpressJS library first and initialize a new ExpressJS application:

      const express = require('express') 
      const app = express() 

3. Add a new route method to handle requests for the path "/". The first argument specifies the path or URL, the next argument is the route handler. Inside the route handler, let's use the response object to send a status code 200 (OK) and text to the client:

      app.get('/', (request, response, nextHandler) => { 
          response.status(200).send('Hello from ExpressJS') 
      }) 

4. Finally, use the listen method to accept new connections on port 1337:

      app.listen( 
         1337, 
          () => console.log('Web Server running on port 1337'), 
      ) 

5. Save the file
6. Open a Terminal and run the following command:

     node 1-basic-route.js 

7. Open a new tab on your browser and visit localhost on port 1337 in your web browser to see the results:

      http://localhost:1337/