NextJS 15: React 19, Less Caching, Turbopack, Better Hydration Errors and MORE from Vercel Ship!

NextJS 15 Release Candidate 0 is out and it's got so much good stuff. Let's take a look feature by feature and try them out to see what's in store for us. React 19! Caching is off by default! Super fast builds with Turbopack! Hydration errors you can actually debug! And much more! Let's jump in!

Code: https://github.com/jherr/next-15-rc-0
Release Notes: https://nextjs.org/blog/next-15-rc

👉 Upcoming NextJS course: https://pronextjs.dev
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👉 Discord server signup:   / discord  
👉 VS Code theme and font? Night Wolf [black] and Operator Mono
👉 Terminal Theme and font? oh-my-posh with powerlevel10k_rainbow and SpaceMono NF

00:00 Introduction
00:20 Trying Out NextJS 15
02:19 Now On React 19
04:13 Integrated React Compiler
06:51 Better Hydration Errors
07:56 Caching Off By Default
14:59 Per-Router Partial Pre-Rendering
15:24 Post-Route Callback with After
16:26 Build Updates