NexusMart - Multi-Vendor E-commerce Platform

A comprehensive and scalable e-commerce application built with Next.js 15 and Redux Toolkit. This project features a modern, responsive user interface designed for optimal performance. It includes advanced functionalities like real-time product searching, filtering, a dynamic comparison tool, and a seamless checkout process. The app integrates with external APIs to fetch live product data, providing a full-stack feel with a robust frontend architecture.

Jul 2025 - Sep 2025

Web Application

Technologies

#Next.js 15#TypeScript#Redux#Tailwind CSS#REST API#Responsive Design

Live Demo Source Code

Key Features

Advanced Cart & Checkout: complete checkout flow with form validation, shipping calculations, and order summary.
Product Comparison System: Interactive tool allowing users to compare specifications of up to 3 products side-by-side.
Smart Search & Filtering: Dynamic search bar with category-based sidebar filtering for precise product discovery.
Wishlist & User Profile: Persistent wishlist functionality and a user dashboard to track order history and profile details.
High-Performance Architecture: Utilizes Next.js App Router and Server Components for SEO and fast load times.
Fully Responsive Design: Optimized for all devices with a mobile-first approach using Tailwind CSS.

Case Study Overview

# NexusMart: A Scalable Multi-Vendor Ecosystem NexusMart is designed as a robust multi-vendor marketplace platform where multiple sellers can list products and users can shop seamlessly. Built with **Next.js 15**, it focuses on scalability, high performance, and a superior user experience. ## 🏗 Architecture & Tech Stack - **Frontend:** Next.js 15 (App Router) & TypeScript - **State Management:** Redux Toolkit (Cart, Wishlist, Compare Logic) - **Styling:** Tailwind CSS (Responsive Design System) - **API Integration:** Dynamic data fetching for products, categories, and user profiles ## 🚀 Key Highlights - **Vendor-Ready Catalog:** Scalable product pages capable of handling inventory from diverse categories. - **Dynamic Vendor Comparison:** Users can compare similar products from the marketplace side-by-side to make better decisions. - **Advanced Filtering:** Powerful search capabilities allowing filtering by category, price, and specs simulating a real multi-vendor environment. - **Optimized Checkout:** A streamlined, distraction-free checkout process designed to reduce cart abandonment.

The Challenge

One of the major hurdles was managing persistent state across server-side rendered (SSR) pages and the client side. Specifically, accessing localStorage during the SSR process caused hydration mismatches and build failures, as the server does not have access to the browser's storage API. Additionally, synchronizing the "Product Comparison" state dynamically for up to 3 items while ensuring the UI updated instantly was a logic-heavy task.

My Solution

To resolve the SSR storage issue, I implemented a custom createWebStorage utility in Redux. This utility checks for the window object's existence before attempting to access localStorage, providing a fallback no-op storage for the server environment. This ensured the app hydration was smooth and error-free. For the comparison feature, I leveraged Redux actions to strictly enforce the 3-item limit and used conditional rendering in React components to provide immediate visual feedback (like the floating counter) to the user.