Secure Coding Practices for Frontend Engineers
Modern frontend engineers build applications that are richer and more complex than ever. With React, TypeScript, and Node.js powering SPAs and APIs, the frontend is an active part of the security perimeter. This article maps practical secure coding practices for frontend engineers to the OWASP Top 10 (2021) , giving you a clear checklist for building safer apps. 1 — Broken Access Control Why it matters: Relying only on client-side UI restrictions is insufficient — attackers may call backend endpoints directly. Practices: Enforce access control server-side in Node.js, use frontend route guards for UX only, and avoid shipping privileged data in the bundle. // React route guard (UX only — backend must enforce) <Route path="/admin" element={user?.role === 'admin' ? <AdminPanel /> : <Navigate to="/403" />} /> 2 — Cryptographic Failures Why it matters: Mishandled tokens and secrets lead to...