E-Commerce Bookstore Platform

This assignment focuses on developing a server-side application using Node.js and Express to handle form submissions, validate input, and compute order totals for a simple book purchasing system. Students will build a web form that allows users to select a book and input a desired quantity. Upon submission, the server will validate the form data, ensuring a valid book is selected and a legal quantity is entered. The application is modularized using separate model functions, which store and retrieve book data, perform validation, and calculate the final cost including tax (1.75%). The project emphasizes server-side validation without any client-side enforcement, encouraging the separation of concerns through middleware and model-based architecture. A successful implementation includes structured error handling, use of Express middleware functions to separate logic stages, and generation of a dynamic receipt upon a valid order. All book data and logic must reside in an external module, promoting code reuse and maintainability. The assignment reinforces foundational backend development skills critical for robust web application design.

Keywords: Routing, Express, Node.js, ISBN, Middleware.