mutation.js代码：
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changeRoute(state, val) { let routeList = state.routeList; let isFind = false; let findeIdex = 0; //菜单栏和下拉的二级菜单 if (val['type'] == 'header' || val['type'] == 'secondHeader') { routeList.length = 0; //顶级菜单清除缓存 localStorage.removeItem("routeList"); } let routes = routeList; let localStorageList = localStorage.getItem('routeList'); if (localStorageList) { //当前页刷新,使用缓存数据 routes = JSON.parse(localStorageList as any); } //遍历是否有存入当前路由位置 for (let i = 0; i < routes.length; i++) { isFind = routes[i]['name'] == val['name']; if (isFind) { findeIdex = i; break; } }; if (isFind) { //有的话，清除当前路由以后的数据 routes.splice(findeIdex + 1, routes.length - findeIdex - 1); //修改缓存 localStorage.setItem('routeList', JSON.stringify(routes)); } else { //存入全局变量 routes.push(val); //设置缓存 localStorage.setItem('routeList', JSON.stringify(routes)); } } |
页面使用：
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//获取面包屑缓存 let localStorageList1 = localStorage.getItem('routeList'); //ts写法 as any this.routeList = JSON.parse(localStorageList1 as any) ? JSON.parse(localStorageList1 as any) : { name: 'test', url: '/test' }; |
知识点：
1、localstorage
2、JSON.stringify()的作用是将 JavaScript 值转换为 JSON 字符串，JSON.parse()将JSON字符串转为一个对象
补充知识：vue+elementUI动态生成面包屑导航
项目需要动态生成面包屑导航,并且首页可以点击.其余为路径显示
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<el-menu :unique-opened="true" router :default-active="$route.path" @select="handleSelect"> <div class="user-menu-box" v-for="menu in menus" :key="menu.id"> <el-menu-item v-if="!menu.child" :index="menu.path"> <icon :name="menu.icon" :w="20" :h="20"></icon> <span slot="title" v-text="menu.name"></span> </el-menu-item> <el-submenu v-if="menu.child" :index="menu.path"> <template slot="title"> <icon :name="menu.icon" :w="20" :h="20"></icon> <span slot="title" v-text="menu.name"></span> </template> <el-menu-item-group> <el-menu-item v-for="subMenu in menu.child" :key="subMenu.id" v-text="subMenu.name" :index="subMenu.path"></el-menu-item> </el-menu-item-group> </el-submenu> </div></el-menu> |
上面的代码是elementUI组件的样式,根据项目需要做了修改,搬运的时候根据项目自己改改
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export default { data () { return { activeMenu: '', indexBreadcrumbs: [], menus: [{ id: '1', name: '门户管理', icon: 'menhuguanli', path: '#2', child: [{ id: '1-1', name: '轮播图', path: '/backstage/protaManage/turns' }, { id: '1-2', name: '基础数据', path: '/backstage/protaManage/basis' }, { id: '1-3', name: '分类管理', path: '/backstage/protaManage/classify' }, { id: '1-4', name: '内容发布', path: '/backstage/protaManage/content' }] }, { id: '2', name: '我的云盘', icon: 'yunpan', path: '/backstage/yunManage' }, { id: '3', name: '管理菜单', icon: 'shezhi', path: '/backstage/menusManage' }, { id: '4', name: '编辑板块', icon: 'fabuzhongxin', path: '/backstage/editPlate' }] } }, watch: { $route () { this.handChange() } }, computed: { breadcrumbList () { let breadcrumbs = [] let menuList = this.menus this.indexBreadcrumbs.map(item => { for (let i = 0; i < menuList.length; i++) { if (item === menuList[i].path) { breadcrumbs.push(menuList[i]) if (menuList[i].child) { menuList = menuList[i].child } break; } } }) return breadcrumbs } }, methods: { handChange () { this.$emit('hand-change', this.breadcrumbList) }, handleSelect (index, indexPath) { this.indexBreadcrumbs = indexPath } }, created () { this.handChange() }} |
上面的代码是模拟的数据,调用elememtUI的组件导航菜单的中的@select方法,有两个参数,可以自行打印
然后在computed中计算当前选中的是哪一部分,取到返回值,然后$emit传给父组件,
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<el-breadcrumb separator-class="el-icon-arrow-right"> <el-breadcrumb-item :to="{ path: '/backstage' }">首页</el-breadcrumb-item> <el-breadcrumb-item v-for="o in breadcrumbList" :key="o.id">{{o.name}} </el-breadcrumb-item> </el-breadcrumb> |
父组件中取到子组件传过来的值后,直接渲染就行了
以上这篇vue 使用localstorage实现面包屑的操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://www.cnblogs.com/qiufang/p/11544538.html
