Process Module in Node.js
From the Node.js Core Modules cheat sheet · Process & OS · verified Jul 2026
Process Module
Access command line arguments, environment, and control process
javascript
// Arguments & Environment
console.log(process.argv);
console.log(process.env.NODE_ENV);
// Exit
process.exit(0);
// Current directory
process.cwd();
// Memory usage
process.memoryUsage();
// Event handlers
process.on('uncaughtException', (err) => {
console.error(err);
});🟢 Essential - Control Node.js runtime behavior
💡 process.env for environment variables
📌 process.argv contains command line arguments
⚠️ process.exit() immediately terminates (use carefully)
⚡ process.nextTick() for async scheduling
🔗 Related: dotenv for .env file loading