Element UI导航菜单刷新就复原问题解决方法~

1、首先要知道为什么一刷新就复原了，是因为default-active属性设置的是默认值，是一个死值，一旦刷新就会复原，造成高亮不能保持，那么怎么解决呢？

2、很简单，无需像一些博主一样绑定path。思路：既然一刷新就复原了，那么我们在切换的时候就将值存储在本地存储或vuex中呗。

方法一：本地存储

<el-menu:default-active="activeIndex2" class="el-menu-demo" mode="horizontal"@select="handleSelect" background-color="#545c64" text-color="#fff"active-text-color="#ffd04b"
><el-menu-item :index="String(index)" v-for="(item,index) in list" :key="item.id">{{ item.name }}</el-menu-item><el-submenu index="4"><template slot="title">我的工作台</template><el-menu-item index="4-1">设置</el-menu-item><el-menu-item index="4-2" >退出</el-menu-item></el-submenu>
</el-menu><script>
export default {name: "showTop",data() {return {list: [{name:"首页",id:0},{name:"商品",id:1},{name:"订单",id:2},{name:"会员",id:3},{name:"设置",id:4},{name:"管理员",id:5}],activeIndex2: null};},mounted(){if(localStorage.getItem('activeIndex2')){this.activeIndex2 =localStorage.getItem('activeIndex2')}else{this.activeIndex2 =String(this.list[0].id)}},methods: {// 顶部导航栏点击事件handleSelect(key, keyPath) {console.log(key,keyPath);// 解决element ui组件库中顶部导航栏刷新复原问题，也可存储在vuex中localStorage.setItem('activeIndex2',String(this.list[key].id))// 判断是否是退出按钮if(key=='4-2'){// 清空本地缓存的tokenlocalStorage.removeItem('token')// 跳转至登录页this.$router.push({name:'login'})}}},
};
</script>

方法二：vuex+本地存储

<el-menu:default-active="activeIndex2" class="el-menu-demo" mode="horizontal"@select="handleSelect" background-color="#545c64" text-color="#fff"active-text-color="#ffd04b"
><el-menu-item :index="String(index)" v-for="(item,index) in list" :key="item.id">{{ item.name }}</el-menu-item><el-submenu index="4"><template slot="title">我的工作台</template><el-menu-item index="4-1">设置</el-menu-item><el-menu-item index="4-2" >退出</el-menu-item></el-submenu>
</el-menu><script>
import { mapMutations} from 'vuex';
export default {name: "showTop",data() {return {list: [{name:"首页",id:0},{name:"商品",id:1},{name:"订单",id:2},{name:"会员",id:3},{name:"设置",id:4},{name:"管理员",id:5}],activeIndex2: null};},mounted(){if(localStorage.getItem('activeIndex2')){this.activeIndex2 =localStorage.getItem('activeIndex2')}else{this.activeIndex2 =String(this.list[0].id)}},methods: {...mapMutations(['setActiveIndex2']),// 顶部导航栏点击事件handleSelect(key, keyPath) {console.log(key,keyPath);// 存储到vuex中，但是要记住还需要在vuex中存储到本地存储中this.setActiveIndex2(String(this.list[key].id))// 判断是否是退出按钮if(key=='4-2'){// 清空本地缓存的tokenlocalStorage.removeItem('token')// 跳转至登录页this.$router.push({name:'login'})}}},
};
</script>

//store中的index.js
import Vue from "vue"
import Vuex from "vuex"
Vue.use(Vuex)export default new Vuex.Store({state:{activeIndex:'',},mutations:{setActiveIndex2(state,e){state.activeIndex = ewindow.localStorage.setItem('activeIndex2',e)}},
})

import Vue from 'vue'
import App from './App.vue'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
import router from '../router';
import store from '../store';
Vue.use(ElementUI);Vue.config.productionTip = falsenew Vue({router,store,render: h => h(App),
}).$mount('#app')

效果图：