7 Common Mistakes That Make Your Error Handlers Useless
Every developer has written a try-catch block and called it a day. You wrap a risky operation, log the error,…
Why Your React App’s State Updates Silently Fail – and How to Catch Them
You've just written a clean `setCount(count + 1)`. The component renders. Nothing moves. No error. No crash. Just... the old…
How to Debug WebSocket Connection Failures in Progressive Web Apps
You are building a Progressive Web App that relies on WebSockets for real time updates. Everything works fine on localhost.…
5 Steps to Debug Any Frontend Bug in Under 10 Minutes
You are staring at a broken CSS layout. The button refuses to change color. Your `useEffect` runs twice and you…
The One Debugging Tool That Saved My Week
Last Tuesday, I spent four hours hunting a bug that turned out to be a single misplaced parenthesis. Four hours…
Why Your Errors Have Different Shapes and What to Do About It
You train a model. You check the residuals. And there they are: patterns you did not expect. Maybe the errors…
Why Your Source Maps Don’t Work in Production and How to Fix Them
Your production error logs show `main.a1b2c3.js:1:12345`. You click the stack trace, and the browser opens a wall of minified code.…
How to Track Down the Elusive ‘Uncaught Promise’ Error That Has No Stack Trace
You open the browser console, and there it is: `Unhandled Promise Rejection` with no file name, no line number, and…
How to Reproduce and Fix Race Conditions in JavaScript
Race conditions in JavaScript can turn a smooth application into a buggy mess. You write code that looks correct. You…
Why Your JavaScript Console Logs Are Not Showing What You Expect
You just added a `console.log('hello')` and... nothing. The browser dev tools console stays blank. No error message. No output. It…