Welcome to the Ultimate Guide on even-better-logger!

Discover the power of even-better-logger, a superior logging library designed for modern applications. This guide introduces dozens of useful API explanations with code snippets to enhance your application’s logging capabilities.

Getting Started

To begin using even-better-logger, install the library using npm:

npm install even-better-logger

Basic Usage

Initialize the logger in your application:

 const Logger = require('even-better-logger');
 const logger = new Logger();

Logging Messages

Log messages with different severity levels:

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

Logging with Context

Add context to your log messages:

 logger.info('User logged in', { userId: 123 });
 logger.error('Order processing failed', { orderId: 456 });

Custom Log Levels

Create custom log levels to suit your application’s needs:

 logger.addLevel('critical', 2000);
 logger.critical('This is a critical message');

Advanced Configuration

Configure the logger with advanced options:

 const logger = new Logger({
   level: 'debug',
   transports: [
     new Logger.transports.Console(),
     new Logger.transports.File({ filename: 'app.log' })
   ]
 });

Transport Specific Configuration

Configure specific transports:

 const logger = new Logger({
   transports: [
     new Logger.transports.Console({
       level: 'info',
       colorize: true
     }),
     new Logger.transports.File({
       filename: 'errors.log',
       level: 'error'
     })
   ]
 });

Application Example

Here is an example of a Node.js application using even-better-logger:

 const express = require('express');
 const Logger = require('even-better-logger');

 const app = express();
 const logger = new Logger();

 app.use((req, res, next) => {
   logger.info(`Received request for ${req.url}`, { method: req.method });
   next();
 });

 app.get('/', (req, res) => {
   logger.info('Home page accessed');
   res.send('Hello, world!');
 });

 app.use((err, req, res, next) => {
   logger.error('An error occurred', { error: err });
   res.status(500).send('Internal Server Error');
 });

 app.listen(3000, () => {
   logger.info('Server is listening on port 3000');
 });

With advanced configuration options and handy APIs, even-better-logger is a must-have for any modern application that requires robust logging. Start using it today and take your application’s logging to the next level.

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