Route "/[slug]" used `params.slug`. `params` should be awaited before using its properties — here's exactly why Next.js 15+ broke synchronous params, and how to fix every case.
BKG
nextjs
React error: 'Too many re-renders. React limits the number of renders to prevent an infinite loop.' Here's exactly why it fires and how to fix it.
BKG
React
`params` is a Promise and must be unwrapped with await or React.use() before accessing its properties — the exact fix for Next.js 15 and 16 App Router.
BKG
nextjs
Next.js turned params and searchParams into Promises. Here's the exact warning text, why v16 makes it crash instead of warn, and how to fix it for good.
BKG
nextjs
Fix 'Hydration failed because the server rendered HTML didn't match the client' — every documented cause, React 19.3's new browser() API, and the real fix.
BKG
React