Vue.js is a robust front-end framework that excels in creating dynamic web applications, but managing user permissions can be complex. This guide focuses on frontend authorization using CASL, a JavaScript library that allows developers to define and enforce access control directly within Vue applications. Building on a previous guide that introduced role-based access control (RBAC) using Permit.io, this tutorial elaborates on integrating CASL for UI-level authorization by setting up roles, defining permissions, and dynamically controlling UI components in a food delivery app. By combining CASL with Permit.io, which handles role assignments and resource definitions through a no-code dashboard, developers can ensure a streamlined and secure user experience. The guide demonstrates setting up a Vue project, installing necessary dependencies, and configuring a backend API to fetch permissions, which are then stored in a Pinia store for easy access. Through CASL's $can and $cannot directives or Permit.io's permit.check() function, Vue components can dynamically adapt based on user roles and permissions, ensuring only authorized users can interact with certain features, like creating, fulfilling, or delivering orders. This integration of CASL and Permit.io offers a comprehensive solution for implementing fine-grained UI authorization in Vue applications.