· Asep Alazhari · Development
React DevTools Profiler: Find and Fix Performance Issues in 30 Minutes
Learn to use React DevTools Profiler to find performance bottlenecks and eliminate unnecessary re-renders. Includes real-world examples and fixes.
Category: Development
![ERR_UPLOAD_FILE_CHANGED in Next.js: Complete Fix Guide [2026]](https://cdn.asepalazhari.com/images/articles/development/fixing-err-upload-file-changed-nextjs-production.png)
· Asep Alazhari · DevelopmentERR_UPLOAD_FILE_CHANGED in Next.js: Complete Fix Guide [2026]
Only seeing ERR_UPLOAD_FILE_CHANGED in production but not on localhost? This guide explains the exact root cause — FormData lifecycle and file reference expiry — with a step-by-step fix to stop this Next.js file upload bug for good.
· Asep Alazhari · DevelopmentWhen Unit Testing Becomes Essential: A Developer's Journey
Discover why unit testing matters through real production failures and learn when to implement tests in your Next.js projects.
· Asep Alazhari · DevelopmentServer Actions vs Client Rendering in Next.js: The 2025 Guide
Master the art of choosing between Server Actions and client rendering in Next.js. Learn when to use each approach with real performance insights.
· Asep Alazhari · DevelopmentWSL2 Ubuntu: My Windows Developer Experience After 4 Years on macOS
After 4 years of macOS development, I returned to Windows and discovered WSL2 Ubuntu. Here's my honest experience with the challenges and solutions.
· Asep Alazhari · DevelopmentShadcn/ui vs Chakra UI vs Material-UI: Component Battle 2025
Discover the ultimate React component library. Compare Shadcn/ui, Chakra UI, and Material-UI across performance, customization & developer experience.