理解 useMemo
原文英文,约300词,阅读约需1分钟。发表于: 。React re-renders components every time state or props change, which is great for keeping things up-to-date. But, it can also cause performance issues if you're doing heavy calculations on every...
React在状态或属性变化时会重新渲染组件,可能导致性能问题。useMemo钩子用于缓存函数结果,仅在依赖变化时重新计算,适合耗时计算和避免不必要的重新渲染。使用useMemo可以提高性能,但不应过度使用,轻量计算无需优化。