Secure Coding, Secrets, and Privacy

Security in React isn't optional—it's mandatory. Every day, developers accidentally commit API keys to public repositories, expose user data via client-side logging, and ship code vulnerable to XSS attacks. This series teaches you the defensive coding patterns, environment variable hygiene, and privacy-first architecture that separate production-grade React apps from liability-filled hobby projects. You'll learn exactly where secrets live (spoiler: not on the client), how to spot and fix the OWASP Top 10 frontend vulnerabilities, and why "nobody will notice" is not a security strategy.

By the end of these 10 tutorials, you'll understand how to architect React applications that treat security as a first-class concern: from the moment you write your first environment variable through GDPR-compliant user data handling, secure form submission, and rigorous penetration testing. Each article builds on the last, starting with why the problem exists and ending with enterprise-grade defense-in-depth patterns used by companies like Stripe and Shopify.

Articles in this series

1. Why React Apps Leak Secrets: Environment Variables 101
2. How to Use .env Files Safely in React Applications
3. Keeping API Keys Out of Your React Bundle
4. Sanitize User Input to Prevent XSS in React
5. Secure Logging Practices for React Applications
6. Handling Personal Data: GDPR and React Privacy
7. Implementing Authentication Without Exposing Credentials
8. Building Secure Forms: CSRF Protection in React
9. Front-End OWASP Top 10: React Security Checklist
10. End-to-End Security Testing for React Applications