메뉴
Frontend error handling patterns for Next.js — error boundaries, API error display, form validation errors, and global error recovery strategies. Use when implementing error states, debugging error UI, or designing error recovery flows.
기본적으로 소스를 먼저 확인하는 Prompt가 선택됩니다. 직접 명령으로 전환하거나 로컬 사본을 다운로드할 수도 있습니다.
설치 여부를 결정하기 전에 SKILL.md와 SkillsMP에 표시된 보조 파일을 읽어 보세요.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
직접 명령은 검토 Prompt를 거치지 않습니다. 실행하기 전에 소스를 확인하세요.
npx skills add https://github.com/lennney/skills --skill error-handling명령은 한 줄로 유지됩니다. 복사하기 전에 가로로 스크롤해 전체 내용을 확인하세요.
로컬 사본을 원하시나요? SkillsMP에서 현재 제공할 수 있는 파일을 다운로드하세요.
SKILL.md 표시 중
| name | error-handling |
| description | Frontend error handling patterns for Next.js — error boundaries, API error display, form validation errors, and global error recovery strategies. Use when implementing error states, debugging error UI, or designing error recovery flows. |
Systematic approach to error handling in Next.js applications.
Next.js provides built-in error boundaries at every route segment level:
app/
├── error.tsx ← Global error boundary (wraps entire app)
├── layout.tsx
├── dashboard/
│ ├── error.tsx ← Dashboard-specific error boundary
│ ├── page.tsx
│ └── settings/
│ ├── error.tsx ← Settings-specific error boundary
│ └── page.tsx
app/error.tsx)'use client'
export default function Error({
error,
reset,
}: {
error: Error & { digest?: string }
reset: () => void
}) {
return (
<div role="alert">
<h1>Something went wrong</h1>
<p>We've been notified. Please try again.</p>
<button onClick={() => reset()}>Try again</button>
{/* In dev: show error.message for debugging */}
{process.env.NODE_ENV === 'development' && (
<pre>{error.message}</pre>
)}
</div>
)
}
app/dashboard/error.tsx)'use client'
export default function DashboardError({
error,
reset,
}: {
error: Error & { digest?: string }
reset: () => void
}) {
return (
<div className="p-6 rounded-lg border border-red-200 bg-red-50" role="alert">
<h2>Dashboard unavailable</h2>
<p>{error.message || 'Failed to load dashboard data'}</p>
<button onClick={() => reset()}>Retry</button>
</div>
)
}
'use server'
export async function createPost(formData: FormData) {
try {
const title = formData.get('title')
if (!title || typeof title !== 'string') {
return { error: 'Title is required' }
}
if (title.length < 3) {
return { error: 'Title must be at least 3 characters' }
}
await db.post.create({ title })
return { success: true }
} catch (e) {
console.error('createPost failed:', e)
return { error: 'Failed to create post. Please try again.' }
}
}
// Client-side handling
'use client'
export function PostForm() {
const [state, formAction, pending] = useActionState(createPost, null)
return (
<form action={formAction}>
<input name="title" aria-invalid={state?.error ? true : undefined} />
{state?.error && <p role="alert" className="text-red-500">{state.error}</p>}
<button disabled={pending}>{pending ? 'Creating...' : 'Create'}</button>
</form>
)
}
// lib/fetch.ts — unified fetch wrapper
export async function apiFetch<T>(
url: string,
options?: RequestInit
): Promise<{ data: T | null; error: string | null }> {
try {
const res = await fetch(url, options)
if (!res.ok) {
const body = await res.json().catch(() => ({}))
return { data: null, error: body.message || `Request failed (${res.status})` }
}
return { data: await res.json(), error: null }
} catch (e) {
return { data: null, error: 'Network error. Please check your connection.' }
}
}
global-error.tsx (Root fallback)'use client'
export default function GlobalError({
error,
reset,
}: {
error: Error & { digest?: string }
reset: () => void
}) {
return (
<html>
<body>
<div role="alert">
<h1>Critical error</h1>
<button onClick={() => reset()}>Reload page</button>
</div>
</body>
</html>
)
}
| Error Type | User Message | Action |
|---|---|---|
| Network offline | "You appear to be offline" | Retry button |
| Server error (5xx) | "Our servers are busy. Please try again." | Retry button |
| Not found (404) | "This page doesn't exist" | Go home link |
| Validation | Specific field error message | Fix input |
| Rate limited | "Too many requests. Please wait." | Countdown timer |
| Auth expired | "Your session has expired" | Login button |
error.tsx boundary{ data, error } objects (never throw on expected errors)role="alert"global-error.tsx exists (catches root layout errors)error.message exposed in production
SOC 직업 분류 기준