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  • vuex--学习笔记

    1.概念(略):官方文档

    2.安装

    npm install vuex --save

    3.项目目录结构

    4.在main.js引入 创建的store仓库

    // The Vue build version to load with the `import` command
    // (runtime-only or standalone) has been set in webpack.base.conf with an alias.
    import Vue from 'vue'
    import App from './App'
    import router from './router'
    import store from './vuex/store'
    
    Vue.config.productionTip = false
    
    /* eslint-disable no-new */
    new Vue({
      el: '#app',
      router,
      store,
      components: { App },
      template: '<App/>'
    })

    5.templates:

    <template>
      <div class="hello">
        <h1>{{ msg }}</h1>
        <div>{{ count }}</div>
        <button @click="add">button</button>
      </div>
    </template>
    
    <script>
    import * as GetterTypes from '@/constants/GetterTypes'
    import * as MutationTypes from '@/constants/MutationTypes'
    import { mapGetters, mapMutations } from 'vuex'
    export default {
      name: 'HelloWorld',
      data () {
        return {
          msg: 'Welcome to Your Vue.js App'
        }
      },
      computed: {
        ...mapGetters([
          [GetterTypes.GET_COUNT]
        ]),
        ...mapGetters({
          count: [GetterTypes.GET_COUNT]
        })
      },
      methods: {
        ...mapMutations([
          [MutationTypes.SET_COUNT]
        ]),
        ...mapMutations({
          [MutationTypes.SET_COUNT]: MutationTypes.SET_COUNT
        }),
        add () {
          let count = this.count + 1
          this[MutationTypes.SET_COUNT](count)
        }
      }
    }
    </script>
    
    <!-- Add "scoped" attribute to limit CSS to this component only -->
    <style scoped>

    vuex文件夹

    store.js

    import Vue from 'vue'
    import Vuex from 'vuex'
    import * as mutations from './mutations'
    import * as getters from './getters'
    
    Vue.use(Vuex)
    
    const state = {
      // 计数改变
      count: 0
    }
    
    export default new Vuex.Store({
      state,
      getters: getters.getters,
      mutations: mutations.mutations
    })

    mutations.js:

    import * as MutationTypes from '@/constants/MutationTypes'
    
    export const mutations = {
      [MutationTypes.SET_COUNT]: (state, count) => {
        state.count = count
      }
    }

    getters.js:

    /**
     * 状态的派生属性
     */
    import * as GetterTypes from '@/constants/GetterTypes'
    
    export const getters = {
      [GetterTypes.GET_COUNT]: (state) => {
        return state.count
      }
    }

    constants

    GetterTypes.js:

    // 获取
    export const GET_COUNT = 'getCount'

    MutationTypes.js:

    // 设置
    export const SET_COUNT = 'setCount'
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  • 原文地址:https://www.cnblogs.com/CaktyRiven/p/10722338.html
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