Day 28 of #100DaysOfCode — Building a Library API

Today marks Day 28 of my #100DaysOfCode journey, and this session felt extra special. After learning the fundamentals, including Node.js , Express.js , REST APIs, middleware patterns, routing strategies, and working with request data, I combined these concepts to build a backend for a simple Library Management System. Why a Library Management System Backend? I chose to build a Library Management System backend because it’s the perfect balance between simplicity and real-world complexity. It touches almost every core concept of backend development, such as: CRUD operations validation authentication-like checks structured routing. This library system has the following logics: Managing book details (title, author, genre) Managing library members (details of the members). Borrowing details of the members Availability of books Editing the details of books and members with a valid authentication token 📁 Folder Structure library-api/ │ ├── data/ │ ├── books.data.json │ ├── members.data.json │