这篇文章主要介绍“vue3在setup中怎么使用mapState”,在日常操作中,相信很多人在vue3在setup中怎么使用mapState问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”vue3在setup中怎么使用mapState”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
hooks/useMapState.ts
import { computed } from "vue"
import { mapState, useStore } from "vuex"
export default function (state:any) {
// 1. 获取实例 $store
const store = useStore()
// 2. 遍历状态数据
const storeStateFns = mapState(state)
// 3. 存放处理好的数据对象
const storeState = {}
// 4. 对每个函数进行computed
Object.keys(storeStateFns).forEach(fnKey => {
const fn = storeStateFns[fnKey].bind({ $store: store })
// 遍历生成这种数据结构 => {name: ref(), age: ref()}
storeState[fnKey] = computed(fn)
})
return storeState
}
使用
<script lang="ts" setup>
import useMapState from "@/hooks/useMapState"
const myState:any = useMapState({
includeList: (state: any) => state.keepAlive.includeList
})
const { includeList } = myState
</script>
在Vue的组件中,要想使用Vuex中的多个State,我们经过会借助mapState辅助函数进行获取值,但是在Vue3中,通过computed的来获取多个值的方法官方并未提供,话不多说,直接上代码。
useMapState.js
import { computed } from "vue";
import { mapState, useStore } from "vuex"
export const useMapState = (getKeys) => {
const store = useStore();
const storeState = {}
const storeFns = mapState(getKeys)
Object.keys(storeFns).forEach((fnKeys) => {
const fn = storeFns[fnKeys].bind({$store: store})
storeState[fnKeys] = computed(fn)
})
return storeState
}
<script>
import { useMapState } from ''./Hooks/useMapState.js'
export default {
setup() {
const storeState = useMapState(['title', 'counter'])
return {
...storeState
}
}
}
</script>
在setup语法糖中由于不能使用 return进行返回,所以只能按照如下方式写了
<script setup>
import { useMapState } from ''./Hooks/useMapState.js'
const { title, counter } = useMapState(['title', 'counter'])
</script>
到此,关于“vue3在setup中怎么使用mapState”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注亿速云网站,小编会继续努力为大家带来更多实用的文章!
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原文链接:https://blog.csdn.net/mrhaoxiaojun/article/details/124082989