The Module System in Javascript

Mastering the module system in JavaScript is crucial for creating scalable, maintainable, and efficient code. Modules help with code organization, reusability, encapsulation, and dependency management. CommonJS is the first module system in Nodejs, and it uses require() and module.exports to import and export modules. The difference between module.exports and exports is that module.exports replaces the entire exports object, while exports is a shorthand reference to module.exports.