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fec-data-fetching

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用于实现或审查前端服务端状态流程：类型化查询、请求缓存、失效、mutation、乐观更新、无限查询、预取、SSR hydration 或 API 层整合。不要用于本地 UI 状态或 Service Worker 缓存；中文触发词包括 数据获取、缓存、乐观更新。

localized/zh-CN/skills/fec-data-fetching/SKILL.md

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Nov 6, 2026
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# Server State 数据获取

## 用途

为前端 server state 建立清晰的数据获取、缓存、失效和提交边界，避免请求状态散落在页面组件中。

## 流程

1. 判断状态来源：来自服务端且需要缓存、去重、刷新、分页或 mutation 时使用请求缓存方案；纯本地 UI 状态用组件 state 或 store。
2. 先沿用项目已有数据获取库；新增依赖时 React/Vue/Solid/Svelte 可考虑 TanStack Query，也可沿用 SWR、Nuxt/Nitro 数据获取或项目封装。
3. 设计稳定 cache key/query key：结构包含实体、动作和所有影响结果的参数。
4. API 函数保持纯请求函数，数据 hook/composable 负责缓存、select、loading/error/empty 状态。
5. mutation 成功后 invalidation；需要即时反馈时使用 optimistic update 并在失败时回滚。