Vue.js, a high-performance web framework, excels in creating fast web applications using Vite for tooling and Single-File Components (SFCs) to streamline the development process. This guide illustrates implementing Role-Based Access Control (RBAC) in a Vue application using Permit.io, an authorization-as-a-service solution, through a practical example of a food delivery app. It details defining system resources, actions, and roles, such as customer, rider, vendor, and admin, and explains how to configure RBAC by assigning roles to users and enforcing access control. The guide covers both frontend and backend implementation, integrating Permit.io for secure permission checks and structuring Vue components to align with role-specific UI behavior. This approach ensures a scalable and secure authorization system, with potential for further refinement through advanced access control models like attribute-based access control (ABAC) or relationship-based access control (ReBAC) as the application expands.