Tips, Fixes & Bugs
Bite-sized developer lessons you can read in under a minute. Daily Dev Tips, 1-Min Fixes, and real Bug of the Day breakdowns — straight to the point, no fluff.
Array Deduplication Challenge (3 Ways)
Can you remove duplicate values from an array using 3 different approaches in JavaScript?
Why useEffect Runs Twice in React (Not a Bug)
If your useEffect runs twice in development, it is due to React Strict Mode and not an actual bug.
Fix Port Already in Use Error Instantly
Quickly free up a busy port and restart your server without wasting time debugging.
Avoid Re-render Hell in React (Use Memoization Wisely)
Unnecessary re-renders can hurt performance. Use memoization to optimize your React components.
Stop Using console.log in Production (Use This Instead)
console.log is fine for debugging, but in production it hurts performance and gives you zero structure.
Fix CORS Error in 1 Line (Express.js)
Quickly fix CORS errors in your API by enabling cross-origin requests with a simple middleware.
API Returning 500 Randomly (Async Bug You Might Be Ignoring)
Random 500 errors often come from unhandled async errors that silently crash your request flow.