wordpress 移植海城整站优化
文章目录
- 结论（实战建议）
- 主要区别
- - 状态与副作用
- - 错误边界（Error Boundary）
- - 性能与体积
- - 可读性与心智模型
- - 生态与未来
- 最小示例
- - 函数组件
- - 类组件错误边界
- - **怎么选**
结论（实战建议）
- 默认用函数组件（Hooks）。更简洁、易组合、类型更友好、生态新能力都在 Hooks。
- 只有当你需要“错误边界”时才考虑类组件（目前稳定版仍只有类组件支持）。
主要区别
- 状态与副作用
- 函数组件：
useState/useEffect/useMemo/useCallback等 Hooks，可组合、无this。 - 类组件：
this.state/setState+ 生命周期方法（componentDidMount/Update/WillUnmount）。
- 错误边界（Error Boundary）
- 仅类组件可稳定实现（
static getDerivedStateFromError,componentDidCatch）。
- 性能与体积
- 函数组件通常更小、更易优化（
React.memo、闭包组合）。 - 类组件优化依赖
PureComponent/shouldComponentUpdate。
- 可读性与心智模型
- 函数组件更函数式，关注数据流和依赖；类组件有
this/绑定等负担。
- 生态与未来
- 新特性、并发/
Suspense配合、社区最佳实践都以 Hooks 为中心。
最小示例
- 函数组件
function Counter() {const [count, setCount] = React.useState(0);return <button onClick={() => setCount(c => c + 1)}>{count}</button>;
}
- 类组件错误边界
class ErrorBoundary extends React.Component {state = { hasError: false };static getDerivedStateFromError() { return { hasError: true }; }componentDidCatch(err, info) {}render() { return this.state.hasError ? <div>Fallback</div> : this.props.children; }
}
- 怎么选
- 日常业务组件：函数组件
- 需要错误边界：类组件（或用现成错误边界包裹）
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