JSON-Server for Next.js 15: Everything You Need to Know

JSON Server is a tool that allows you to quickly create a RESTful API using a simple JSON file, supporting CRUD operations, dynamic routes, and ease of use. It's useful for frontend-first development, rapid prototyping, and custom API behavior. To set up JSON Server, install it as a development dependency, create a db.json file, and configure it by adding a script to package.json. The script runs the server with the db.json file and specifies a port, and you can add a delay flag to simulate network latency. The server can be run with npm run json-server, making the API live at http://localhost:4000. JSON Server supports HTTP methods such as GET, POST, PUT, and DELETE, which can be used to fetch, add, update, and delete data respectively. Examples of using these methods with Next.js 15 and TypeScript are provided, including using the new use feature in Next.js. Best practices for using JSON Server include managing ports, handling errors, defining types, storing API URLs in environment variables, and simulating latency. JSON Server is a powerful tool for frontend developers working with Next.js 15, providing an easy way to simulate APIs and accelerate development workflows. With JSON Server, you can integrate a mock API into your Next.js project and start building UI components before the backend is ready.