useMemo Hook 详解
原文英文,约500词,阅读约需2分钟。发表于: 。The useMemo hook is a part of React's Hooks API, introduced in React 16.8, designed to optimize performance by memoizing the results of expensive calculations. Here's a detailed explanation: ...
useMemo 是 React 16.8 引入的 Hook,用于通过缓存计算结果来优化性能,减少不必要的渲染。它在初次渲染时计算结果,仅在依赖项变化时重新计算。适合用于昂贵计算,但需谨慎使用以避免代码复杂化。