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NOVAS SKILLS: - next-best-practices v0.1.0 (CLEAN) — Next.js App Router, RSC, caching, data - nextjs-patterns v1.0.0 (CLEAN) — Next.js 15: Server Actions, route handlers - vite v1.0.0 (CLEAN) — env vars, aliases, proxy, CJS compat - uncle-bob v1.0.0 (CLEAN) — Clean Code, SOLID, Clean Architecture - clean-code-review v1.0.0 (CLEAN) — naming, guard clauses, anti-patterns, refactoring - vue v1.0.0 (CLEAN) — Vue framework - vue-composition-api-best-practices v1.0.0 (CLEAN) — composables, Pinia, reactivity BIBLIOTECA INTELIGENTE libs/ (10 dominios, 11 arquivos): - typescript/ — TS safe + generics gotchas - react/ — Next.js App Router + Vite config - vue/ — Composition API + Pinia - linux/ — System diagnostic cheatsheet - database/ — PostgreSQL + MySQL patterns - browser/ — Chromium CLI + E2E testing - security/ — SAST audit (OWASP Top 10) - best-practices/ — Clean Code + SOLID + Clean Architecture - deploy/ — Docker multi-stack + OpenClaw ops - + INDEX.md como guia de navegacao .learnings/ — LRN-20260519-003 criado (biblioteca compartilhada)
88 lines
1.6 KiB
Markdown
88 lines
1.6 KiB
Markdown
# Async Patterns
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In Next.js 15+, `params`, `searchParams`, `cookies()`, and `headers()` are asynchronous.
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## Async Params and SearchParams
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Always type them as `Promise<...>` and await them.
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### Pages and Layouts
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```tsx
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type Props = { params: Promise<{ slug: string }> }
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export default async function Page({ params }: Props) {
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const { slug } = await params
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}
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```
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### Route Handlers
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```tsx
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export async function GET(
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request: Request,
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{ params }: { params: Promise<{ id: string }> }
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) {
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const { id } = await params
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}
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```
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### SearchParams
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```tsx
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type Props = {
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params: Promise<{ slug: string }>
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searchParams: Promise<{ query?: string }>
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}
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export default async function Page({ params, searchParams }: Props) {
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const { slug } = await params
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const { query } = await searchParams
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}
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```
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### Synchronous Components
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Use `React.use()` for non-async components:
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```tsx
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import { use } from 'react'
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type Props = { params: Promise<{ slug: string }> }
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export default function Page({ params }: Props) {
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const { slug } = use(params)
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}
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```
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### generateMetadata
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```tsx
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type Props = { params: Promise<{ slug: string }> }
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export async function generateMetadata({ params }: Props): Promise<Metadata> {
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const { slug } = await params
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return { title: slug }
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}
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```
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## Async Cookies and Headers
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```tsx
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import { cookies, headers } from 'next/headers'
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export default async function Page() {
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const cookieStore = await cookies()
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const headersList = await headers()
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const theme = cookieStore.get('theme')
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const userAgent = headersList.get('user-agent')
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}
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```
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## Migration Codemod
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```bash
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npx @next/codemod@latest next-async-request-api .
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```
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