29 Big Mistakes When Using Next.js (and how to fix them...)

Description

Are you making critical Next.js mistakes without realizing it? This tutorial covers 29 common mistakes developers make with server components, client components, server actions, cache components, suspense boundaries, and route handlers. Learn Next.js best practices for optimization, performance, static rendering, dynamic rendering, and proper use cache implementation. Whether you're working with the Next.js app router, React server components, or debugging Next.js errors, this comprehensive guide will help you avoid these pitfalls and write production-ready code following Next.js development best practices in 2026. ⭐️ Check out Graphite here: https://dub.sh/graphite Thank you Graphite for kindly sponsoring this video. 🚀 Master Next.js 16 by shipping 7+ production-ready apps here: https://dub.sh/nextjscourse 🎁 Download 29 Mistakes Cheatsheet: https://dub.sh/nextjs-mistakes 🎥 What to Watch next? https://youtu.be/tI_Nt32_4wM https://youtu.be/MeXWSpx48q0 ⏰ Chapters 00:00 - Intro: Next.js Mistakes 01:06 - Mistake 1: Client Page Component 02:56 - Mistake 2: Unprotected Server Actions 06:07 - Mistake 3: Server Components in Actions File 08:16 - Mistake 4: Shipping AI Code Unreviewed 12:22 - Mistake 5: Route Handlers vs Server Components 14:32 - Mistake 6: Suspense Boundary Placement 15:55 - Mistake 7: Cache vs Cache Private 19:00 - Mistake 8: Update Tag vs Refresh 22:33 - Mistake 9: Context Providers 24:14 - Mistake 10: Browser APIs in Server Components 26:15 - Mistake 11: Unnecessary Client Components 27:30 - Mistake 12: Data Revalidation 29:39 - Mistake 13: Redirect in Try-Catch 31:08 - Mistake 14: Overusing Server Components 32:23 - Mistake 15: Not Using Loading.tsx 34:34 - Mistake 16: Fetching Data Twice 37:16 - Mistake 17: Hydration Errors 38:19 - Mistake 18: Layout.tsx Usage 41:04 - Mistake 19: Not Caching Repeatable Code 41:58 - Mistake 20: Environment Variable Leaks 44:30 - Mistake 21: Missing Error.tsx 45:25 - Mistake 22: Dynamic Metadata 46:03 - Mistake 23: Request Memoization 46:32 - Mistake 24: Redirect vs Router Push 48:36 - Mistake 25: Google Fonts Loading 49:40 - Mistake 26: Debug Logs 50:55 - Mistake 27: Image Sizes Prop 52:04 - Mistake 28: Cache Tagging 54:08 - Mistake 29: Mutations in Server Components 55:34 - Next Steps 💌 Frontend Newsletter: Frontend Snacks 🍿 https://dub.sh/frontend-snacks If you liked this video, you will also love my newsletter Frontend Snacks. You will learn a new topic each week with cool visuals and snippets, the latest frontend news and behind-the-scenes exclusive updates that I don't share anywhere else. ✨ FREE Goodies: https://kulkarniankita.com/goodies ☎️ Book a 1:1 coaching session with me Opened a few coaching calls, grab them before they are gone: https://bit.ly/30mins-coaching-with-ankita 🐤 Find me here Twitter: https://twitter.com/kulkarniankita9/ LinkedIn: https://www.linkedin.com/in/kulkarniankita/