nuxt之vuex中使用nuxtServerInit方法

官网介绍nuxtServerInit方法

https://zh.nuxtjs.org/guide/vuex-store/#nuxtserverinit-%E6%96%B9%E6%B3%95

vuex中模块化使用示例

挂载vuex中state模块及nuxtServerInit方法, store-->index.js

在geo.vue组件中获取数据

<template>
  <div class="m-geo">
    <i class="el-icon-location"/>{{ $store.state.geo.position.city }}
    <nuxt-link
      class="changeCity"
      to="/changeCity">切换城市</nuxt-link>
    [香河 廊坊 天津]
  </div>
</template>

二，通过SSR渲染，将商品列表数据传给客户端，不是通过异步请求接口获取数据

store-->modules-->新建home.js

const state = () => ({menu: [], hotPlace: []})

const mutations = {
  setMenu(state, val) {
    state.menu = val
  },
  setHotPlace(state, val) {
    state.hotPlace = val
  }
}

const actions = {
  setMenu: ({
    commit
  }, menu) => {
    commit('setMenu', menu)
  },
  setHotPlace: ({
    commit
  }, hotPlace) => {
    commit('setHotPlace', hotPlace)
  }
}

export default {namespaced: true, state, mutations, actions}

store-->index.js，通过ssr服务端获取数据，存储到vuex,让客户端获取数据

import Vue from 'vue'
import Vuex from 'vuex'
import geo from './modules/geo'
import home from './modules/home'

Vue.use(Vuex)

const store = () => new Vuex.Store({
  modules: {
    geo,
    home
  },
  actions: {
    async nuxtServerInit({
      commit
    }, {req, app}) {
      const {
        status,
        data: {
          province,
          city
        }
      } = await app.$axios.get('/geo/getPosition')
      // 提交到geo.js文件中的setPosition函数，将当前城市位置{city,province}保存在vuex中
      commit('geo/setPosition',status===200?{city,province}:{city:'',province:''})
      const {status:status2,data:{menu}}=await app.$axios.get('geo/menu')
      //提交到home.js文件中的setMenu函数，将menu商品分类数据保存在vuex中
      commit('home/setMenu',status2===200?menu:[])
      const {status:status3,data:{result}}=await app.$axios.get('/search/hotPlace',{
        params:{
          city:app.store.state.geo.position.city.replace('市','')
        }
      })
      //提交到home.js文件中的setHotPlace函数，将result热门景点数据保存在vuex中
      commit('home/setHotPlace',status3===200?result:[])
    }
  }
})

export default store

menu.vue组件中，获取数据

<template>
  <div class="m-menu">
    <!-- 左侧商品列表 -->
    <dl
      class="nav"
      @mouseleave="mouseleave">
      <dt>全部分类</dt>
      <dd
        v-for="(item,idx) in $store.state.home.menu"
        :key="idx"
        @mouseenter="enter">
        <i :class="item.type"/>{{ item.name }}<span class="arrow"/>
      </dd>
    </dl>
    <!-- 右侧商品列表 -->
    <div
      v-if="kind"
      class="detail"
      @mouseenter="sover"
      @mouseleave="sout">
      <template
        v-for="(item,idx) in curdetail.child">
        <h4 :key="idx">{{ item.title }}</h4>
        <span
          v-for="v in item.child"
          :key="v">{{ v }}</span>
      </template>
    </div>
  </div>
</template>

  computed:{
    curdetail:function(){
      return this.$store.state.home.menu.filter(item => item.type===this.kind)[0]
    }
  },

三，点击输入框，输入关键字，发送请求，获取与输入关键词有关的数据，以及，热门景点数据填充

在searchbar.vue组件中

<template>
  <div class="search-panel">
    <el-row class="m-header-searchbar">
      <el-col
        :span="3"
        class="left">
        <img
          src="//s0.meituan.net/bs/fe-web-meituan/e5eeaef/img/logo.png"
          alt="美团">
      </el-col>
      <el-col
        :span="15"
        class="center">
        <div class="wrapper">
          <el-input
            v-model="search"
            placeholder="搜索商家或地点"
            @focus="focus"
            @blur="blur"
            @input="input"/>
          <button class="el-button el-button--primary"><i class="el-icon-search"/></button>
          <dl
            v-if="isHotPlace"
            class="hotPlace">
            <dt>热门搜索</dt>
            <dd
              v-for="(item,idx) in $store.state.home.hotPlace.slice(0,5)"
              :key="idx">
              <a :href="'/products?keyword='+encodeURIComponent(item.name)">{{ item.name }}</a>
            </dd>
          </dl>
          <dl
            v-if="isSearchList"
            class="searchList">
            <dd
              v-for="(item,idx) in searchList"
              :key="idx">
              <a :href="'/products?keyword='+encodeURIComponent(item.name)">{{ item.name }}</a>
            </dd>
          </dl>
        </div>
        <p class="suggest">
          <a
            v-for="(item,idx) in $store.state.home.hotPlace.slice(0,5)"
            :key="idx"
            :href="'/products?keyword='+encodeURIComponent(item.name)">{{ item.name }}</a>
        </p>
        <ul class="nav">
          <li><nuxt-link
            to="/"
            class="takeout">美团外卖</nuxt-link></li>
          <li><nuxt-link
            to="/"
            class="movie">猫眼电影</nuxt-link></li>
          <li><nuxt-link
            to="/"
            class="hotel">美团酒店</nuxt-link></li>
          <li><nuxt-link
            to="/"
            class="apartment">民宿/公寓</nuxt-link></li>
          <li><nuxt-link
            to="/"
            class="business">商家入驻</nuxt-link></li>
        </ul>
      </el-col>
      <el-col
        :span="6"
        class="right">
        <ul class="security">
          <li><i class="refund"/><p class="txt">随时退</p></li>
          <li><i class="single"/><p class="txt">不满意免单</p></li>
          <li><i class="overdue"/><p class="txt">过期退</p></li>
        </ul>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data(){
    return {
      search:'',
      isFocus:false,
      hotPlace:[],
      searchList:[]
    }
  },
  computed:{
    isHotPlace:function(){
      return this.isFocus&&!this.search
    },
    isSearchList:function(){
      return this.isFocus&&this.search
    }
  },
  methods:{
    focus:function(){
      this.isFocus=true
    },
    blur:function(){
      let self=this;
      setTimeout(function(){
        self.isFocus=false
      },200)
    },
    // 做个防抖延时函数，引入lodash
    input:_.debounce(async function(){
      let self=this;
      
      let city=self.$store.state.geo.position.city.replace('市','')
      self.searchList=[]
      let {status,data:{top}}=await self.$axios.get('/search/top',{
        params:{
          input:self.search,
          city
        }
      })
      // 截取十条数据
      self.searchList=top.slice(0,10)
    },300)
  }
}
</script>

<style lang="css">
</style>

四，移入不同的标签，展示不同的图片数据

在artistic.vue组件中

<template>
  <section class="m-istyle">
    <dl @mouseover="over">
      <dt>有格调</dt>
      <dd
        :class="{active:kind==='all'}"
        kind="all"
        keyword="景点">全部</dd>
      <dd
        :class="{active:kind==='part'}"
        kind="part"
        keyword="美食">约会聚餐</dd>
      <dd
        :class="{active:kind==='spa'}"
        kind="spa"
        keyword="丽人">丽人SPA</dd>
      <dd
        :class="{active:kind==='movie'}"
        kind="movie"
        keyword="电影">电影演出</dd>
      <dd
        :class="{active:kind==='travel'}"
        kind="travel"
        keyword="旅游">品质出游</dd>
    </dl>
    <ul class="ibody">
      <li
        v-for="item in cur"
        :key="item.title">
        <el-card
          :body-style="{ padding: '0px' }"
          shadow="never">
          <img
            :src="item.img"
            class="image">
          <ul class="cbody">
            <li class="title">{{ item.title }}</li>
            <li class="pos"><span>{{ item.pos }}</span></li>
            <li class="price">￥<em>{{ item.price }}</em><span>/起</span></li>
          </ul>
        </el-card>
      </li>
    </ul>
  </section>
</template>
<script>
export default {
  data: () => {
    return {
      // 默认属性
      kind: 'all',
      list: {
        // 通过kind属性获取对应的数据
        all: [],
        part: [],
        spa: [],
        movie: [],
        travel: []
      }
    }
  },
  computed: {
    // 计算不同类型数据
    cur: function () {
      return this.list[this.kind]
    }
  },
  // 刚加载页面，加载默认的数据
  async mounted(){
    let self=this;
    let {status,data:{count,pois}}=await self.$axios.get('/search/resultsByKeywords',{
      params:{
        // 默认
        keyword:'景点',
        city:self.$store.state.geo.position.city
      }
    })
    if(status===200&&count>0){
      let r= pois.filter(item=>item.photos.length).map(item=>{
        return {
          title:item.name,
          pos:item.type.split(';')[0],
          price:item.biz_ext.cost||'暂无',
          img:item.photos[0].url,
          url:'//abc.com'
        }
      })
      self.list[self.kind]=r.slice(0,9)
    }else{
      self.list[self.kind]=[]
    }
  },
  methods: {
    // 移入事件
    over: async function (e) {
      let dom = e.target
      let tag = dom.tagName.toLowerCase()
      let self = this
      if (tag === 'dd') {
        // 获取自定义的属性,请求参数
        this.kind = dom.getAttribute('kind')
        let keyword = dom.getAttribute('keyword')
        let {status,data:{count,pois}}=await self.$axios.get('/search/resultsByKeywords',{
          params:{
            keyword,
            city:self.$store.state.geo.position.city
          }
        })
        if(status===200&&count>0){
          // 过滤出有图片的数据，并且数据库的字段和前端的字段需要映射（前端字段和数据库字段不一致）
          let r= pois.filter(item=>item.photos.length).map(item=>{
            return {
              title:item.name,
              pos:item.type.split(';')[0],
              price:item.biz_ext.cost||'暂无',
              img:item.photos[0].url,
              url:'//abc.com'
            }
          })
          // 截取9条数据，通过kind属性获取对应的数据
          self.list[self.kind]=r.slice(0,9)
        }else{
          self.list[self.kind]=[]
        }
      }
    }
  },

}
</script>
<style lang="scss">
    @import "@/assets/css/index/artistic.scss";
</style>