Why Storing JWTs in localStorage Is a Security Nightmare for Modern Apps

What's the best way to do authentication in modern applications

I break down the heated debate on where to store authentication tokens, revealing why localStorage and in-memory variables leave your users vulnerable to XSS attacks. I explain how HTTP-only cookies with Secure and SameSite flags offer the only reliable defense, forcing attackers to act only within a live session rather than stealing a permanent skeleton key.

"Anyone who tells you an HTTP-only cookie prevents XSS is confused or selling something."