Enhance Your JavaScript Debugging with jsutil-logger

Introduction to jsutil-logger

The jsutil-logger is a versatile and efficient utility library for JavaScript that provides advanced logging capabilities.
It offers a comprehensive set of APIs to capture, format, and manage your application’s logs effectively.

Core Features and API Examples

Basic Logging

Logging basic information:

  const logger = require('jsutil-logger'); 
  logger.log('info', 'This is an informational message.');

Logging Levels

The library supports multiple logging levels such as error, warn, info, verbose, debug, and silly:

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

Custom Transports

You can define custom transports for logging:

  const customTransport = (level, message) => {
    console.log(`${level}: ${message}`);
  };
  logger.addTransport(customTransport);
  logger.log('info', 'Message with custom transport.');

Formatting Logs

Define custom formats to structure your log messages:

  const formatter = (level, message) => {
    return `[${new Date().toISOString()}] ${level.toUpperCase()}: ${message}`;
  };
  logger.setFormatter(formatter);
  logger.log('info', 'Formatted informational message.');

Filtering Logs

Filtering logs based on their levels:

  logger.setLevel('warn');
  logger.log('info', 'This will not be displayed.');
  logger.log('warn', 'This is a warning message.');
  logger.log('error', 'This is an error message.');

Sample Application Using jsutil-logger

Below is an example of a simple application that uses jsutil-logger to log different levels of messages:

  const logger = require('jsutil-logger');
  
  logger.setLevel('info');

  function connectToDatabase() {
    logger.log('debug', 'Attempting to connect to database...');
    // Database connection logic
    logger.log('info', 'Connected to database successfully.');
  }

  function performTask(taskName) {
    logger.log('info', `Starting task: ${taskName}`);
    try {
      // Task execution logic
      logger.log('debug', `Executing ${taskName}...`);
      logger.log('info', `Task ${taskName} completed successfully.`);
    } catch (error) {
      logger.log('error', `Error while performing task ${taskName}: ${error.message}`);
    }
  }

  function startApplication() {
    logger.log('info', 'Application is starting...');
    connectToDatabase();
    performTask('Data Processing');
    logger.log('info', 'Application finished.');
  }

  startApplication();

Conclusion

The jsutil-logger library provides a robust and flexible solution to handle all your logging needs in a JavaScript application.
From basic logging to advanced custom transports and formatting, it is a must-have utility for JavaScript developers.

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