Implementing Authentication and Authorization in Next.js

Next.js is a popular framework for building server-side rendered web applications, but it lacks built-in authentication and authorization features, which are crucial for application security. Authentication verifies user identities, while authorization determines their access rights, creating a personalized user experience. The article demonstrates integrating Logto for authentication and Permit.io for authorization in a Next.js app, offering a clean separation of concerns. Logto manages user identity and login flows, while Permit.io handles permissions and access control, allowing the implementation of role-based access control (RBAC) with different user roles such as Admin, Editor, and Viewer. The app uses these roles to render distinct UIs based on user permissions, leveraging tools like Tailwind CSS for styling. The article emphasizes planning an RBAC structure to avoid inconsistent permission checks and highlights the benefits of separating authorization logic from application code, including centralized policy management and fine-grained control. It also details setting up a Next.js project, configuring Logto and Permit.io, synchronizing user data, creating custom hooks for permissions, and building a dynamic dashboard with role-based UI, providing a scalable solution for secure applications.