A lightweight and colorful logging package for Node.js and Bun applications. Makes your console output beautiful and saves logs to files!
- Colorful console output
- File logging support
- Multiple log levels (info, warn, error, debug)
- Support for both Node.js and Bun
- JSON object / Array formatting
- Custom IDs for tracking (like process ID)
- Timezone-aware timestamps
# Using npm npm install pretty-js-log# Using bun bun install pretty-js-logconst { logFactory } = require('pretty-js-log'); // Create a basic logger const logger = logFactory({}); // Log some messages logger('Hello World'); logger.info('This is an info message'); logger.warn('Warning! Something needs attention'); logger.error('Oops! Something went wrong'); logger.debug('Debug information');
const logger = logFactory({ path: './logs/app.log', // Logs will be saved here id: process.pid // Add process ID to logs }); logger('This will be saved to the file too!');const data = { user: 'john', age: 25 }; logger('User data:', data); // Objects are automatically formattedAutomatically prefix your log files with dates to organize them by day:
// Using default date format (YYYYMMDD) const logger = logFactory({ path: './logs/app.log', dayBasedFileLog: true }); // Creates: ./logs/20251020-app.log // With custom date format const logger2 = logFactory({ path: './logs/app.log', dayBasedFileLog: true, dateFormat: 'YYYY-MM-DD' }); // Creates: ./logs/2025-10-20-app.log // Hourly log files const logger3 = logFactory({ path: './logs/app.log', dayBasedFileLog: true, dateFormat: 'YYYYMMDD-HH' }); // Creates: ./logs/20251020-14-app.log (for 2 PM)If you want to write logs only to file without console output, use the toStdout option:
const logger = logFactory({ path: './logs/app.log', toStdout: false // Logs will only be written to file }); logger('This will only appear in the log file'); logger.info('Silent logging to file');You can dynamically update the logger ID after creation using the id method:
const logger = logFactory({ id: 'initial-id' }); logger('First log with initial ID'); logger.id('new-id'); logger('This log will show the new ID');When you run your logs, they'll look something like this in the console:
[2024-03-15 10:30:45] - [id:1234] - Hello World [2024-03-15 10:30:46] - [id:1234] - This is an info message [2024-03-15 10:30:47] - [id:1234] - Warning! Something needs attention Feel free to open issues and submit PRs! This is an open-source project and we welcome contributions.
MIT License - feel free to use this in your projects!
- File logging rotation based on file size or on dates.
- Add support for external logging API's endpoints.
Belguinan Noureddine
GitHub: https://github.com/belguinan