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This react rerender tool flashes the guilty component
A react rerender tool paints a purple outline on the guilty memoized child. Drop the script before React, click once, then leave that Profiler closed.
Build AlongReactJavaScriptDeveloper ToolsDebuggingPerformance1 min read · Aug 25, 2026
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.
Sharper ToolsJavaScriptWeb DevDebuggingPerformance1 min read · Apr 11, 2026