Tips, Fixes & Bugs
Bite-sized developer lessons you can read in under a minute. Fresh content every day — tips, 1-min fixes, and real bug breakdowns, straight to the point.
Latest from each series
Stop Using map() for Side Effects
Using Array.map() for side effects leads to confusing code and unnecessary memory usage.
Fix “Too Many Re-renders” Error in React
This error happens when your component keeps updating state inside render, causing an infinite loop.
API Returns Cached Data Even After Update
Your API returns old data even after updating records due to caching issues in browser, CDN, or server.
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Today's challengeAll tips & fixes
19 items9 results
Stop Using map() for Side Effects
Using Array.map() for side effects leads to confusing code and unnecessary memory usage.
Don’t Hide Errors Behind Generic Toasts
A “Something went wrong” message helps nobody. Log the real error and show users what they can do next.
Always Add Timeouts to External API Calls
Never call external APIs without a timeout — one slow dependency can freeze your entire system.
Validate Request Payloads at the API Boundary
Never trust incoming request data. Validate it at the API boundary before it touches business logic or the database.
Stop trusting “it works on my machine”
If a fix only works on your laptop, it is not a fix. It is a temporary illusion.
Avoid Hardcoding API URLs — Use Environment Variables Properly
Hardcoding API URLs makes your app hard to manage across environments. Use environment variables for flexibility and security.
Array Deduplication Challenge (3 Ways)
Can you remove duplicate values from an array using 3 different approaches in JavaScript?
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.