Chapter XXII · Modules
Modules
Modules are self-contained blocks of code that let you split large applications into separate, reusable files.
01 How It Works
Think of organizing tools into separate specialized toolboxes rather than tossing everything into a single pile.
Each module maintains its own private scope; variables and functions are kept private unless explicitly exported.
example.js
// math.js
export const add = (a, b) => a + b;1. Separate code logic into individual modular files.
2. Export required functions or variables.
3. Import them into other script files.
02 Practical Example
Here is how you might see this concept applied in real-world code:
practical.js
// utils.js
export function format(str) { return str.trim(); }Key Takeaway
Modules promote clean separation of concerns, encapsulation, and maintainable code architecture.