vuex的mutations和action传参案例

野性酷女 2024-04-17 14:18 34阅读 0赞

对于项目结构单一store的传参这里不重复讲了，可以看上一篇提到的[案例][Link 1]。下面要讲得是项目文件结构分开的传参。

├── index.html
    ├── main.js
    ├── api
    │   └── ... # 抽取出API请求
    ├── components
    │   ├── App.vue
    │   └── ...
    └── store
        ├── index.js          # 我们组装模块并导出 store 的地方
        ├── actions.js        # 根级别的 action
        ├── mutations.js      # 根级别的 mutation
        ├── state.js          # 根级别的 sate
        └── modules
            ├── cart.js       # 购物车模块
            └── products.js   # 产品模块

对于跟级别的传参：

index.js

import Vue from 'vue'
    import Vuex from 'vuex'
    import state from './state'
    import * as getters from './getters'
    import * as actions from './actions'
    import * as mutations from './mutations'
    
    Vue.use(Vuex)
    
    const store = new Vuex.Store({
      state,
      getters,
      actions,
      mutations
    })
    
    if (module.hot) {
      module.hot.accept([
        './getters',
        './actions',
        './mutations'
      ], () => {
        store.hotUpdate({
          getters: require('./getters'),
          actions: require('./actions'),
          mutations: require('./mutations')
        })
      })
    }
    
    export default store

state.js

const state = {
      DT1:0,
      count: 1,
      history: []
    };
    export default state;

getters.js

export const count = state => state.count
    export const DT1 = state => state.DT1
    
    const limit = 5
    
    export const recentHistory = state => {
      const end = state.history.length
      const begin = end - limit < 0 ? 0 : end - limit
      return state.history
        .slice(begin, end)
        .join(', ')
    }

mutations.js  **传参id进来**

export const setId1 = (state,id)  => {
      state.DT1 = id
      localStorage.setItem('id1', id);
    }
    
    export const increment = (state)  => {
      state.count++
      state.history.push('increment')
    }
    
    export const decrement = (state)  => {
      state.count--
      state.history.push('decrement')
    }

actions.js **传参id进来**

export const setId1 = ({ commit },id) => {
      commit('setId1',id)
    }
    
    export const increment = ({ commit }) => {
      commit('increment')
    }
    export const decrement = ({ commit }) => {
      commit('decrement')
    }
    
    export const incrementIfOdd = ({ commit, state }) => {
      if ((state.count + 1) % 2 === 0) {
        commit('increment')
      }
    }
    
    export const incrementAsync = ({ commit }) => {
      setTimeout(() => {
        commit('increment')
      }, 1000)
    }

index.vue

<template>
      <div>
        Value: {
       { count }}
        <button @click="increment">+</button>
        <button @click="decrement">-</button>
        <button @click="incrementIfOdd">Increment if odd</button>
        <button @click="incrementAsync">Increment async</button>
        <div>
          <div>Recent History (last 5 entries): {
       { recentHistory }}</div>
        </div>
        <br>
        Value: {
       { DT1 }}
        <button @click="setId1">=</button>
      </div>
    </template>
    
    <script>
      import { mapGetters, mapActions } from 'vuex'
    
      export default {
        computed: {
          ...mapGetters(['count', 'recentHistory','DT1'])
    
        },
        /*第二种写法
        computed: mapGetters([
          'count',
          'recentHistory'
        ]),*/
        /* 第二种写法
        methods: mapActions([
          'increment',
          'decrement',
          'incrementIfOdd',
          'incrementAsync'
        ]),*/
        methods: {
          ...mapActions([
            'increment',
            'decrement',
            'incrementIfOdd',
            'incrementAsync'
          ]),
          setId1() {
              var n=this.$store.getters.count;
              this.$store.dispatch("setId1",n);
          }
    
        },
      }
    </script>

[Link 1]: https://blog.csdn.net/weixin_41380972/article/details/100095978