Introduction to Strong Logger

Logging is a crucial part of any application, and strong-logger provides a robust and flexible solution for all your logging needs. In this article, we’ll explore the features of strong-logger, showcase dozens of useful API examples, and demonstrate a sample application that incorporates these APIs.

Getting Started with Strong Logger

First, you need to install the strong-logger package:

npm install strong-logger

Logger Initialization

const { Logger } = require('strong-logger');
const logger = new Logger({
  level: 'info',
  format: 'json',
  transports: [
    new Logger.transports.Console(),
    new Logger.transports.File({ filename: 'combined.log' })
  ]
});

Logging Messages

 logger.info('This is an informational message');
 logger.warn('This is a warning message');
 logger.error('This is an error message');
 logger.debug('This is a debug message');

Logging with Metadata

 logger.info('User logged in', { userId: '1234', role: 'admin' });

Custom Logger Levels

 const customLevels = {
   levels: {
     trace: 0,
     debug: 1,
     info: 2,
     warn: 3,
     error: 4,
     fatal: 5
   },
   colors: {
     trace: 'blue',
     debug: 'green',
     info: 'white',
     warn: 'yellow',
     error: 'red',
     fatal: 'magenta'
   }
 };
 const logger = new Logger({ customLevels });
 
 logger.fatal('This is a fatal message');

Conditional Logging

 if(logger.isLevelEnabled('debug')) {
   logger.debug('Debug mode is enabled');
 }

Logging Exceptions

 try {
   throw new Error('Something went wrong');
 } catch (error) {
   logger.error('An error occurred', error);
 }

Sample Application

 const express = require('express');
 const { Logger } = require('strong-logger');
 
 const app = express();
 const logger = new Logger({
   level: 'info',
   format: 'json',
 });
 
 app.use((req, res, next) => {
   logger.info('Incoming request', { url: req.url, method: req.method });
   next();
 });
 
 app.get('/', (req, res) => {
   logger.info('Handling GET /');
   res.send('Hello, World!');
 });
 
 app.listen(3000, () => {
   logger.info('Server is running on port 3000');
 });

By incorporating strong-logger into your applications, you can ensure comprehensive and versatile logging capabilities. Try experimenting with the provided examples and see how strong-logger can enhance your application’s logging experience.

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