Next.js fixes
The Next.js App Router errors you hit with component libraries and animated UI, reproduced and fixed with tested code.
- overscroll-behavior contain: Stop Scroll Stealing in Reactoverscroll-behavior: contain stops scroll from chaining to the page once a scroll container hits its edge, so use it on drawers and modal lists. On a horizontal table or carousel use overscroll-behavior-x: contain only, keep the height natural, and drop wheel handlers that call preventDefault.Oct 16, 2026 · 8 min
- useSyncExternalStore getServerSnapshot: Next.js FixuseSyncExternalStore needs a third argument, getServerSnapshot, whenever Next.js renders the component on the server, which includes client components on static routes. Without it next build fails with "Missing getServerSnapshot". Return a constant default such as false or true, and React swaps in the real browser value after hydration.Oct 14, 2026 · 7 min
- Next.js Hydration Error from Dates: 5 Tested FixesA Next.js hydration error from dates happens because a client component renders on the server and again in the browser, and new Date(), toLocaleString() or Math.random() return different text each time. Fix it by formatting on the server with a pinned time zone, filling the value in after mount, or skipping SSR for that widget.Oct 12, 2026 · 8 min
- "use client" Error in Next.js: useState, Context, onClickA "use client" error in Next.js means a Server Component imported code that needs the browser: a hook, createContext or an event handler. Add "use client" to that component's file, or re-export a third-party component from your own client wrapper, keep page.tsx a Server Component, and pass only serializable props.Oct 1, 2026 · 8 min