# App-like UX in Next.js 16.3 > Source: > Published: 2026-08-23 15:38:17+00:00 A hands-on look at how Next.js 16.3 helps apps feel fast and smooth, more like a single-page app, without losing the benefits of server rendering. Using four demo apps, it shows how features like Instant Navigations, Cache Components, Partial Prefetching, optimistic updates, Suspense streaming, offline retry, and View Transitions work together in real apps Protect your AI applications from prompt injection, PII leaks, and unauthorized tool calls. The Next.js team opened the floor to community questions and covered a lot of ground. The AMA focused on Next.js 16.3, performance, caching, App Router, React Server Components, and upgrading apps, along with some insight into how the team works on the framework This guide shows how `useActionState` and `useOptimistic` can work together to keep the UI updated right away, save changes in the right order, and roll back cleanly if something fails The new `next/root-params` API lets Server Components read top-level params like `[locale]` from deep in the tree, which makes next-intl much easier to use `browser()` APIThe docs for React's new `browser()` API are now available in Canary. You can pass it to `use()` , where it suspends to the nearest Suspense boundary on the server, then renders normally in the browser A big release for Better Auth, especially around OAuth, OpenID Connect, SCIM, SSO, MCP, and device login flows. The main theme here is stronger auth, better enterprise identity support, and more standards-based ways for apps and devices to sign in and get access A calendar and booking demo exploring Async React, Cache Components, Partial Prefetching, and View Transitions with Next.js 16.3, React 19, Tailwind CSS v4, and Prisma. Formisch, a schema-based form library, has reached a stable v1 release and is now ready for production use. It works across eight frameworks and lets you keep the same form logic even if you change UI or framework later A collection of Tailwind CSS utilities for fading edges of scroll containers based on scroll position. If you’re building something for the Next.js community, consider [sponsoring this newsletter](https://nextjsweekly.com/sponsors) and putting it in front of 7,100+ Next.js developers. The author makes the case that AI is changing what makes an engineer valuable. If anyone can generate lots of code, then the real skill is making good decisions, spotting bad ideas early, and understanding the system well enough to explain and improve it Cursor has mostly finished moving from Solid to React, saying React was the safer and more predictable choice for performance and maintenance. It also found React easier for AI agents to work with in practice This article explores using a branded `Stable` type to mark values that should not change reference unless something real changes