React 中如何可以实现 vue3.2 新增的 effectScope 特性呢? - V2EX
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SystemLight
V2EX    React

React 中如何可以实现 vue3.2 新增的 effectScope 特性呢?

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  •   SystemLight
    SystemLight 2022-07-27 11:51:07 +08:00 2899 次点击
    这是一个创建于 1238 天前的主题,其中的信息可能已经有所发展或是发生改变。

    effectScope 可以让不同的组件之间共享相同的依赖存活周期,即可以实现多个组件共享相同状态,并且实现所有的组件都被销毁后触发响应式状态销毁,这样优化了相同的内容重复注册,还共享了数据状态

    import {ref, onScopeDispose, effectScope} from 'vue'; export function createSharedComposable(composable) { let subscribers = 0 let state, scope const dispose = () => { if (scope && --subscribers <= 0) { scope.stop() state = scope = null } } return (...args) => { subscribers++ if (!state) { scope = effectScope(true) state = scope.run(() => composable(...args)) } onScopeDispose(dispose) return state } } export let useShareMouse = createSharedComposable(useMouse) export function useMouse() { const x = ref(0) const y = ref(0) function handler(e) { x.value = e.x y.value = e.y } window.addEventListener('mousemove', handler) onScopeDispose(() => { console.log('onUnmounted') window.removeEventListener('mousemove', handler) }) return {x, y} } 
    3 条回复    2022-07-27 13:28:24 +08:00
    SystemLight
        1
    SystemLight  
    OP
       2022-07-27 12:02:50 +08:00
    突然想到可以用高阶组件配合 context 可以实现,[code]( https://github.com/SystemLight/create-kiva/blob/master/packages/react-kiva/template/kiva/model/index.tsx),但是需要操作上层组件,但是 vue 中不需要操作上层组件就可以实现,根本问题可能是 react hook 无法存在分支,也不能主动触发内部声明周期
    mxT52CRuqR6o5
        2
    mxT52CRuqR6o5  
       2022-07-27 12:57:08 +08:00
    只要放弃官方的 hooks 就能在 react 中实现类似 effectScope 的东西(比如 mobx )
    serco
        3
    serco  
       2022-07-27 13:28:24 +08:00
    React 实现这种要方便的话基本都是靠生态里的工具,hook 只负责共享代码,加上 jotai 或者 recoil 就可以了。context 太麻烦了。
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