3.2. Debug logging

Procedure

1. Add the debug logging definition.

   const debug = require('debug')('myexample');

2. Add debug statements.

   app.use('/api/greeting', (request, response) => {
     const name = request.query ? request.query.name : undefined;
     //log name in debugging
     debug('name: '+name);
     response.send({content: `Hello, ${name || 'World'}`});
   });

3. Add the debug module to package.json.

   ...
   "dependencies": {
       "debug": "^3.1.0"
     }

   Depending on your application, this module may already be included. For example, when using the express generator to create your application, the debug module is already added to package.json.

4. Install the application dependencies.

   $ npm install