Playground API
Stop Waiting for the Backend • Part 16 of 121 min read•2026-09-20

How to Test RBAC Permissions & 403 Forbidden States in React Without Modifying Backend Auth

Learn how to test Role-Based Access Control (Admin, Editor, Viewer, Guest) and 403 Forbidden permission gates in React using Playground API.

NK
Nilesh Kumar
Creator of Playground API
How to Test RBAC Permissions & 403 Forbidden States in React Without Modifying Backend Auth

How to Test RBAC Permissions & 403 Forbidden States in React Without Modifying Backend Auth

Implementing Role-Based Access Control (RBAC) in frontend applications is essential:

  • Admins can create, edit, and delete any resource.
  • Editors can create and edit content, but cannot delete or access billing settings.
  • Viewers have read-only access.
  • Guests are redirected to login screens.

During frontend development, switching between user roles traditionally requires logging out, clearing cookies, and logging into separate test accounts.

Playground API now provides instantaneous Role-Based Access Control (RBAC) Simulation!

1. Simulating Roles via Headers or Query Parameters

You can switch roles per-request without creating new accounts:

  • Header: X-Playground-Role: admin | editor | viewer | guest
  • Query Parameter: ?_role=viewer
Terminal
# Viewer attempting to delete a post -> returns 403 Forbidden
curl -X DELETE https://playground.nileslabs.com/posts/1 \
-H "X-Playground-Role: viewer"

Response:

json
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{
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"statusCode": 403,
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"error": "Forbidden",
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"message": "Role 'viewer' does not have permission to perform DELETE on 'posts'",
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"requiredRole": ["admin", "editor"]
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}

2. Building a Permission Gate Component in React

tsx
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import { ReactNode } from 'react';
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type Role = 'admin' | 'editor' | 'viewer' | 'guest';
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interface CanProps {
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role: Role;
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perform: 'create' | 'edit' | 'delete' | 'view';
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children: ReactNode;
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fallback?: ReactNode;
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}
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const permissions: Record<Role, string[]> = {
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admin: ['create', 'edit', 'delete', 'view'],
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editor: ['create', 'edit', 'view'],
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viewer: ['view'],
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guest: [],
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};
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export function Can({ role, perform, children, fallback = null }: CanProps) {
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const allowed = permissions[role]?.includes(perform);
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return allowed ? <>{children}</> : <>{fallback}</>;
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}

3. Interactive RBAC Studio

Test all role combinations and explore permission matrices in the documentation:

👉 https://playground.nileslabs.com/docs/rbac

Conclusion

Test role gates, permission denials, and UI authorization banners seamlessly with Playground API!

Tags:#react#webdev#javascript#security
Series: Stop Waiting for the Backend
Part 16 of 12
Previous Article (#15)
How to Test Multipart File Uploads & Cloud Storage CDN in React Without an S3 Bucket
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