import router from '../router'
export default {
  state: {
    toolBarData:[],// 保存标签button的数组
    cacheView:[] // 保存需要缓存的数组
  },
  getters: {
    getToolData(state){
      return state.toolBarData;
    },
    getCacheView(state){
      return state.cacheView;
    }
  },
  mutations: {
    setToolData(state, data) { // 添加标签按钮，如果当前路由已经打开，则不再重复添加
      const inToolbar = state.toolBarData.find(item => item.detail === data.detail)
      !inToolbar && state.toolBarData.push({
        ...data
      });
    },
    setCacheView(state,data){ // 与setToolData类似
      if(state.cacheView.includes(data.componentName)) 
        return;
      state.cacheView.push(data.componentName);
    },
    clearToolItem(state,detail){
      const index = state.toolBarData.findIndex(item => item.detail === detail);
      const isActive = router.app.$route.path == state.toolBarData[index]["detail"];
      const len = state.toolBarData.length - 1;
      state.toolBarData.splice(index,1);
      (index == len || isActive) && router.push({path:state.toolBarData[state.toolBarData.length - 1]["detail"]});
    },
    clearCacheView(state,viewName){
      const index = state.cacheView.findIndex(item => item == viewName);
      state.cacheView.splice(index,1);
    }
  },
  actions: {
    commitToolBar({commit},data) {
      commit("setToolData",data);
      commit("setCacheView",data);
    },
    clearToolBar({commit},data){
      commit("clearToolItem",data.detail);
    },
    clearCache({commit},data){
      commit("clearCacheView",data);
    }
  }
}

<template>
  <el-main style="position:relative;margin-top:45px;">
    <!--渲染标签的地方-->
    <ToolBar></ToolBar>
    <div class="routeWrap">
      <transition name="fade-transform">
        <keep-alive :include="cachedViews">
          <router-view></router-view>
        </keep-alive>
      </transition>
    </div>
  </el-main>
 </template>
 <script>
  export default {
    watch: {
      $route() {
      // 路由组件名称（自定义）
       const componentName =this.$route.matched[0]["components"]["default"][ "name"];
       const detail = this.$route.path;
       // 当前路由匹配到name
       const name = this.$route.meta[0]["name"];
       this.$store.dispatch("commitToolBar", { name, detail, componentName });
      }
    }
  }
 </script>

<template>
 <div class="toolbar">
  <el-tag
   class="toolItem"
   type="info"
   :disable-transitions="false"
   :closable="item.id != 0"
   effect="plain"
   v-for="(item,index) in getToolData"
   :key="index"
   :class="{active:$route.path == item.detail}"
   @click="redirect(item)"
   @close="closeToolItem(item)"
  >
   <span class="dot" v-if="$route.path == item.detail"></span>
   {{item.name}}
  </el-tag>
 </div>
</template>

<script>
import { mapGetters } from "vuex";
export default {
 methods: {
  closeToolItem(item, index) {
   this.$store.dispatch("clearToolBar", item);
   this.$store.dispatch("clearCache", item.componentName);
  },
  redirect(item) {
   this.$router.push({ path: item.detail });
  }
 },
 computed: {
  ...mapGetters(["getToolData", "getCacheView"])
 }
};
</script>

<template>
  <div> A page</div>
</template>
<script>
  export default {
    data(){
      return {
        form :{
          name:'',
          password:''
        }
      }
    },
    activated(){
      this.getList()
    },
    deactivated(){
      Object.keys(this.form).map(key => {
        this.form[key] = ''
      })
    }
  }
</script>