How did you implement role-based access control on the frontend? How was it determined what to show to the user based on permissions?

The role-based access model on the frontend is usually implemented by storing information about user roles and permissions in the application's state after authentication.

Main approaches:

• After user login, the frontend receives a list of roles and permissions from the server.
• Depending on this data, components or routes are shown or hidden.
• Context or global state (e.g., Redux, Context API in React) is often used to store permissions.
• Utility functions or hooks are created for convenience to check for the presence of required permissions.

Example in React:

const userPermissions = ['read_articles', 'edit_profile'];

function hasPermission(permission) {
  return userPermissions.includes(permission);
}

function Profile() {
  return (
    <div>
      <h1>User Profile</h1>
      {hasPermission('edit_profile') && <button>Edit Profile</button>}
    </div>
  );
}

Thus, the interface adapts to the user, showing only the elements they have permissions for.