ThirtyFour

A flexible logging utility for Node.js applications with console and file logging capabilities.

Features

• 🌈 Colorful console logging with different log levels (info, warn, error, success)
• 📝 Optional file logging with daily log rotation
• 🧹 Automatic cleanup of old log files (7-day retention)
• 🌐 Express middleware for HTTP request logging
• 🔄 Works with both ES Modules and CommonJS projects
• 🔍 Automatic file path detection for error logs

Installation

npm install thirtyfour

Usage

Basic Usage

// ES Modules
import logger from "thirtyfour";

// CommonJS
// const logger = require('thirtyfour').default;

// Log messages with different levels
logger.info("This is an info message");
logger.warn("This is a warning message");
logger.error("This is an error message");
logger.success("This is a success message");

Enable File Logging

• This will generate a log file and each log generated by thirtyfour will be appended in this file.
• For each day a new file will be created.
• A file will be deleted after 7 days. Set the environment variable ENABLE_FILE_LOGGING to "true" before importing the logger:

// Set environment variable
process.env.ENABLE_FILE_LOGGING = "true";

// Import logger
import logger from "thirtyfour";

// Logs will be saved to ./logs/log-YYYY-MM-DD.txt
logger.info("This will be logged to file");

HTTP Request Logging

import express from "express";
import logger, { logRequest } from "thirtyfour";

const app = express();

// Add request logging middleware
app.use(logRequest);

app.get("/", (req, res) => {
  res.send("Hello World");
});

app.listen(3000, () => {
  logger.success("Server started on port 3000");
});

Log Format

The logger uses the following format for different log types:

[INFO] [April 12, 2025 21:12:07]: This is a text info message.
[WARN] [April 12, 2025 21:12:07]: This is a text warning message.
[ERROR] [April 12, 2025 21:12:07]: /path/to/file.js
This is an Error Message
[SUCCESS] [April 12, 2025 21:12:07]: This is a text success message.
[API] [April 12, 2025 21:12:07]: HTTP(200) GET /api/users

Configuration

Environment Variables

• ENABLE_FILE_LOGGING: Set to "true" to enable logging to files (default: false)

Log File Location

Logs are stored in the ./logs directory relative to your application's current working directory.

Log Retention

Log files are automatically deleted after 7 days.

API Reference

Logger Methods

• logger.info(message): Log an informational message
• logger.warn(message): Log a warning message
• logger.error(message): Log an error message with caller file path
• logger.success(message): Log a success message

Middleware

• logRequest: Express middleware for HTTP request logging

License

ISC

Author

Harsh Prajapat, [email protected]