JavaScript Modules Explained: ES Modules, Imports, Exports, and Best Practices

JavaScript modules provide a clean way to split a large application into smaller, focused files. Instead of keeping utilities, business logic, configuration, and application code in one place, modules let each part of the system have a clear responsibility. Modern JavaScript uses ES Modules as the standard approach for sharing functionality between files. Once you understand named exports, default exports, imports, and module boundaries, building maintainable Node.js and browser applications becomes much easier. A module is simply a JavaScript file whose variables and functions are scoped to t