Debugging your ExpressJS web application

Debugging information on ExpressJS about all of the cycle of a web application is something simple. ExpressJS uses the debug NPM module internally to log information. Unlike console.log, debug logs can easily be disabled on production mode.

Getting ready

In this recipe, you will see how to debug your ExpressJS web application. Before you start, create a new package.json file with the following content:

{ 
    "dependencies": { 
        "debug": "3.1.0", 
        "express": "4.16.3" 
    } 
} 

Then, install the dependencies by opening a terminal and running:

npm install

How to do it...

1. Create a new file named debugging.js
2. Initialize a new ExpressJS application:

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

3. Add a route method to handle GET requests for any path:

      app.get('*', (request, response, next) => { 
          response.send('Hello there!') 
      }) 

4. Listen on port 1337 for new connections:

      app.listen( 
          1337...