Vue+Elementui历史导航标签实现

需求

• 用户在点击菜单栏时,内容组件上方会显示历史导航,用于快捷访问历史
• 历史标签可以点击快速查看该内容组件
• 历史组件可删除
• 当容器宽度不足以显示多余的标签时,会隐藏,同时显示左右滚轮
• 历史回滚:删除当前激活的标签后,会回滚到最后一次被激活的标签

效果演示:

源代码

标签组件

Tab.vue

<template>
  <el-tabs type="card" v-if="history&&history.length>0"
           :value="currentPath"
           @tab-click="tabClick"
           @tab-remove="tabRemove"
           closable class="content">
    <el-tab-pane v-for="item in history"
                 :key="item.path"
                 :label="item.name"
                 :name="item.path">
    </el-tab-pane>
  </el-tabs>
</template>

<script>

export default {
  name: "Tab",
  computed:{
    history(){
      return this.$store.getters.history;
    },
    currentPath(){
      return this.$store.getters.currentPath;
    }
  },
  methods:{
    tabClick({name}){
      this.$store.commit('menu/addHistoryPath',name);
      if(name!==this.$route.path){
        this.$router.push(name);
      }
    },
    tabRemove(path){
      this.$store.commit('history/removeHistory',path);
      this.$store.commit('history/removeHistoryPath',path);
    }
  }
}
</script>

<style scoped>
.content{
  margin-top: 5px;
  height: 35px;
  user-select: none;
}
:deep(.el-tabs__nav-wrap){
  height: 35px !important;
  line-height: 35px !important;
}
:deep(.el-tabs__nav-next) , :deep(.el-tabs__nav-prev){
  line-height: 35px !important;
}
:deep(.el-tabs__header){
  height: 35px !important;
  margin: 0;
  border: none;
}
:deep(.el-tabs__item){
  height: 30px;
  margin-top: 2px;
  margin-bottom: 2px;
  border: 1px solid grey !important;
  line-height: 30px;
  padding: 0 10px 0 10px !important;
  border-radius: 2px;
}

:deep(.el-tabs__item:not(:last-child)){
  margin-right: 10px;
}

:deep(.is-active){
  border-bottom:inherit;
  background-color: lightcyan;
}
:deep(.el-tabs__nav){
  border: none !important;
  /*height: 35px;*/
  /*1px solid #E4E7ED*/
}

</style>

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父组件

<el-header height="50px" class="tagsContent">
    <tab></tab>
</el-header>
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菜单组件

在elementui菜单标签中加入点击事件

methods:{
    openMenuItem(name,path){
      this.$store.commit('menu/addHistory',{name,path});
      this.$store.commit('menu/addHistoryPath',path);
    }
  }
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Vuex

src/store/modules/history.js

const state={
    history:[],
    historyPath:[],
    currentPath:null
}

const mutations={
    addHistoryPath(state,path){
        let paths=state.historyPath.filter(item=>{
            return item!==path;
        })
        paths.push(path);
        state.historyPath=paths;
        state.currentPath=path;
    },
    addHistory(state,history){
        let index=-1;
        state.history.forEach((item,i)=>{
            if(item.path===history.path)
                index=i;
        })
        if(index!==-1){
            return;
        }
        state.history.push({
            name:history.name,
            path:history.path
        })
    },
    removeHistory(state,path){
        state.history=state.history.filter(item=>{
            return item.path!==path;
        })
    },
    removeHistoryPath(state,path){
        state.historyPath=state.historyPath.filter(item=>{
            return item!==path;
        })
        if(state.historyPath.length>0)
            state.currentPath=state.historyPath[state.historyPath.length-1];
        else
            state.currentPath=null;
    }
}

export default{
    namespaced:true,
    state,
    mutations
}

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src/store/getters.js

const getters={
    history:state=>state.history.history,
    currentPath:state=>state.history.currentPath
}
export default getters
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src/store/index.js

import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)


import getters from "./getters";

import history from './moudules/history'



const modules= {
    user,
    history
}

export default new Vuex.Store({
    modules,
    getters
})

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