frontend-patterns
React、Next.js、状态管理(State Management)、性能优化(Performance Optimization)及 UI 最佳实践的前端开发模式。
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SKILL.md
소스 지침 · 읽기 전용 미리보기- name
- frontend-patterns
- description
- React、Next.js、状态管理(State Management)、性能优化(Performance Optimization)及 UI 最佳实践的前端开发模式。
- origin
- ECC
# 前端开发模式 (Frontend Development Patterns)
适用于 React、Next.js 和高性能用户界面的现代前端模式。
## 何时激活 (When to Activate)
- 构建 React 组件(组合、Props、渲染)时
- 管理状态(useState、useReducer、Zustand、Context)时
- 实现数据获取(SWR、React Query、服务端组件)时
- 优化性能(记忆化、虚拟化、代码分割)时
- 处理表单(验证、受控输入、Zod 模式)时
- 处理客户端路由和导航时
- 构建具备可访问性(Accessible)且响应式的 UI 模式时
## 组件模式 (Component Patterns)
### 组合优于继承 (Composition Over Inheritance)
```typescript
// ✅ 推荐:组件组合 (Component composition)
interface CardProps {
children: React.ReactNode
variant?: 'default' | 'outlined'
}
export function Card({ children, variant = 'default' }: CardProps) {
return <div className={`card card-${variant}`}>{children}</div>
}
export function CardHeader({ children }: { children: React.ReactNode }) {
return <div className="card-header">{children}</div>
}
export function CardBody({ children }: { children: React.ReactNode }) {
return <div className="card-body">{children}</div>
}
// 使用示例
<Card>
<CardHeader>标题</CardHeader>
<CardBody>内容</CardBody>
</Card>
```
### 复合组件 (Compound Components)
```typescript
interface TabsContextValue {
activeTab: string
setActiveTab: (tab: string) => void
}
const TabsContext = createContext<TabsContextValue | undefined>(undefined)
export function Tabs({ children, defaultTab }: {
children: React.ReactNode
defaultTab: string
}) {
const [activeTab, setActiveTab] = useState(defaultTab)
return (
<TabsContext.Provider value={{ activeTab, setActiveTab }}>
{children}
</TabsContext.Provider>
)
}
export function TabList({ children }: { children: React.ReactNode }) {
return <div className="tab-list">{children}</div>
}
export function Tab({ id, children }: { id: string, children: React.ReactNode }) {
const context = useContext(TabsContext)
if (!context) throw new Error('Tab 必须在 Tabs 内部使用')
return (
<button
className={context.activeTab === id ? 'active' : ''}
onClick={() => context.setActiveTab(id)}
>
{children}
</button>
)
}
// 使用示例
<Tabs defaultTab="overview">
<TabList>
<Tab id="overview">概览</Tab>
<Tab id="details">详情</Tab>
</TabList>
</Tabs>
```
### 渲染属性模式 (Render Props Pattern)
```typescript
interface DataLoaderProps<T> {
url: string
children: (data: T | null, loading: boolean, error: Error | null) => React.ReactNode
}
export function DataLoader<T>({ url, children }: DataLoaderProps<T>) {
const [data, setData] = useState<T | null>(null)
const [loading, setLoading] = useState(true)
const [error, setError] = useState<Error | null>(null)
useEffect(() => {
fetch(url)
.then(res => res.json())
.then(setData)
.catch(setError)
.finally(() => setLoading(false))
}, [url])
return <>{children(data, loading, error)}</>
}
// 使用示例
<DataLoader<Market[]> url="/api/markets">
{(markets, loading, error) => {
if (loading) return <Spinner />
if (error) return <Error error={error} />
return <MarketList markets={markets!} />
}}
</DataLoader>
```
## 自定义钩子模式 (Custom Hooks Patterns)
### 状态管理钩子 (State Management Hook)
```typescript
export function useToggle(initialValue = false): [boolean, () => void] {
const [value, setValue] = useState(initialValue)
const toggle = useCallback(() => {
setValue(v => !v)
}, [])
return [value, toggle]
}
// 使用示例
const [isOpen, toggleOpen] = useToggle()
```
### 异步数据获取钩子 (Async Data Fetching Hook)
```typescript
interface UseQueryOptions<T> {
onSuccess?: (data: T) => void
onError?: (error: Error) => void
enabled?: boolean
}
export function useQuery<T>(
key: string,
fetcher: () => Promise<T>,
options?: UseQueryOptions<T>
) {
const [data, setData] = useState<T | null>(null)
const [error, setError] = useState<Error | null>(null)
const [loading, setLoading] = useState(false)
const refetch = useCallback(async () => {
setLoading(true)
setError(null)
try {
const result = await fetcher()
setData(result)
options?.onSuccess?.(result)
} catch (err) {
const error = err as Error
setError(error)
options?.onError?.(error)
} finally {
setLoading(false)
}
}, [fetcher, options])
useEffect(() => {
if (options?.enabled !== false) {
refetch()
}
}, [key, refetch, options?.enabled])
return { data, error, loading, refetch }
}
// 使用示例
const { data: markets, loading, error, refetch } = useQuery(
'markets',
() => fetch('/api/markets').then(r => r.json()),
{
onSuccess: data => console.log('已获取', data.length, '个市场'),
onError: err => console.error('失败:', err)
}
)
```
### 防抖钩子 (Debounce Hook)
```typescript
export function useDebounce<T>(value: T, delay: number): T {
const [debouncedValue, setDebouncedValue] = useState<T>(value)
useEffect(() => {
const handler = setTimeout(() => {
setDebouncedValue(value)
}, delay)
return () => clearTimeout(handler)
}, [value, delay])
return debouncedValue
}
// 使用示例
const [searchQuery, setSearchQuery] = useState('')
const debouncedQuery = useDebounce(searchQuery, 500)
useEffect(() => {
if (debouncedQuery) {
performSearch(debouncedQuery)
}
}, [debouncedQuery])
```
## 状态管理模式 (State Management Patterns)
### Context + Reducer 模式 (Context + Reducer Pattern)
```typescript
interface State {
markets: Market[]
selectedMarket: Market | null
loading: boolean
}
type Action =
| { type: 'SET_MARKETS'; payload: Market[] }
| { type: 'SELECT_MARKET'; payload: Market }
| { type: 'SET_LOADING'; payload: boolean }
function reducer(state: State, action: Action): State {
switch (action.type) {
case 'SET_MARKETS':
return { ...state, markets: action.payload }
case 'SELECT_MARKET':
return { ...state, selectedMarket: action.payload }
case 'SET_LOADING':
return { ...state, loading: action.payload }
default:
return state
}
}
const MarketContext = createContext<{
state: State
dispatch: Dispatch<Action>
} | undefined>(undefined)
export function MarketProvider({ children }: { children: React.ReactNode }) {
const [state, dispatch] = useReducer(reducer, {
markets: [],
selectedMarket: null,
loading: false
})
return (
<MarketContext.Provider value={{ state, dispatch }}>
{children}
</MarketContext.Provider>
)
}
export function useMarkets() {
const context = useContext(MarketContext)
if (!context) throw new Error('useMarkets 必须在 MarketProvider 内部使用')
return context
}
```
## 性能优化 (Performance Optimization)
### 记忆化 (Memoization)
```typescript
// ✅ 使用 useMemo 处理昂贵的计算
const sortedMarkets = useMemo(() => {
return markets.sort((a, b) => b.volume - a.volume)
}, [markets])
// ✅ 使用 useCallback 处理传递给子组件的函数
const handleSearch = useCallback((query: string) => {
setSearchQuery(query)
}, [])
// ✅ 使用 React.memo 处理纯组件
export const MarketCard = React.memo<MarketCardProps>(({ market }) => {
return (
<div className="market-card">
<h3>{market.name}</h3>
<p>{market.description}</p>
</div>
)
})
```
### 代码分割与懒加载 (Code Splitting & Lazy Loading)
```typescript
import { lazy, Suspense } from 'react'
// ✅ 懒加载重型组件
const HeavyChart = lazy(() => import('./HeavyChart'))
const ThreeJsBackground = lazy(() => import('./ThreeJsBackground'))
export function Dashboard() {
return (
<div>
<Suspense fallback={<ChartSkeleton />}>
<HeavyChart data={data} />
</Suspense>
<Suspense fallback={null}>
<ThreeJsBackground />
</Suspense>
</div>
)
}
```
### 长列表虚拟化 (Virtualization for Long Lists)
```typescript
import { useVirtualizer } from '@tanstack/react-virtual'
export function VirtualMarketList({ markets }: { markets: Market[] }) {
const parentRef = useRef<HTMLDivElement>(null)
const virtualizer = useVirtualizer({
count: markets.length,
getScrollElement: () => parentRef.current,
estimateSize: () => 100, // 预估行高
overscan: 5 // 额外渲染的条目数
})
return (
<div ref={parentRef} style={{ height: '600px', overflow: 'auto' }}>
<div
style={{
height: `${virtualizer.getTotalSize()}px`,
position: 'relative'
}}
>
{virtualizer.getVirtualItems().map(virtualRow => (
<div
key={virtualRow.index}
style={{
position: 'absolute',
top: 0,
left: 0,
width: '100%',
height: `${virtualRow.size}px`,
transform: `translateY(${virtualRow.start}px)`
}}
>
<MarketCard market={markets[virtualRow.index]} />
</div>
))}
</div>
</div>
)
}
```
## 表单处理模式 (Form Handling Patterns)
### 带验证的受控表单 (Controlled Form with Validation)
```typescript
interface FormData {
name: string
description: string
endDate: string
}
interface FormErrors {
name?: string
description?: string
endDate?: string
}
export function CreateMarketForm() {
const [formData, setFormData] = useState<FormData>({
name: '',
description: '',
endDate: ''
})
const [errors, setErrors] = useState<FormErrors>({})
const validate = (): boolean => {
const newErrors: FormErrors = {}
if (!formData.name.trim()) {
newErrors.name = '名称是必填项'
} else if (formData.name.length > 200) {
newErrors.name = '名称必须在 200 个字符以内'
}
if (!formData.description.trim()) {
newErrors.description = '描述是必填项'
}
if (!formData.endDate) {
newErrors.endDate = '截止日期是必填项'
}
setErrors(newErrors)
return Object.keys(newErrors).length === 0
}
const handleSubmit = async (e: React.FormEvent) => {
e.preventDefault()
if (!validate()) return
try {
await createMarket(formData)
// 成功处理
} catch (error) {
// 错误处理
}
}
return (
<form onSubmit={handleSubmit}>
<input
value={formData.name}
onChange={e => setFormData(prev => ({ ...prev, name: e.target.value }))}
placeholder="市场名称"
/>
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