Accessing 'params' or 'searchParams' synchronously in a Page or Layout without awaiting them.
Interactive Simulation Engine
Async Params Validator
Next.js 15+ Breaking Change
app/blog/[id]/page.tsx
export default function Page({ params }: Props) {
const { id } = params; // ❌ ERROR
return <div>{ id }</div>
}
The Logic: In modern Next.js, params and searchParams are now Promises to support future optimizations. You must await them before accessing properties.
Executable Code Workbench
page.tsx
Live Code Editor1// ❌ NEXT.js 15 ERROR: Sync access
2export default function Page({ params }) {
3 const id = params.id // THROWS ERROR
4}
5
6// ✅ FIX: Await params
7export default async function Page({ params }) {
8 const { id } = await params
9}Mental Model
Next.js 15+ requires params to be awaited before use. Use 'async/await' or the 'use' hook.
Why This Exists
To protect the integrity of the rendering lifecycle and ensure your application remains stable across different environments.
Critical Note
"Errors in Next.js aren't just bugs; they are often the framework enforcing strict architectural safety rules to prevent security leaks or performance regressions."