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Performance + Web Dev

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Stop Treating localStorage Like a Database (It Will Bite You in Production)

localStorage has a 5-10MB limit, throws QuotaExceededError silently, and vanishes in Safari private browsing. Here are the five ways it breaks in production and what to use instead.

TutorialsJavaScriptWeb DevDebuggingPerformance1 min read · Apr 11, 2026

Performance + Web Dev

Stop Treating localStorage Like a Database (It Will Bite You in Production)

Performance + Web Dev

Stop Treating localStorage Like a Database (It Will Bite You in Production)

Next.js 16 Cache Components: The Feature Nobody Understands Yet