vue 使用localstorage实现面包屑的操作
作者:Cassie、 时间:2024-05-10 14:19:40
mutation.js代码:
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:
//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
<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
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,
<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
来源:https://www.cnblogs.com/qiufang/p/11544538.html
标签:vue,localstorage,面包屑


猜你喜欢
Python如何自动获取目标网站最新通知
2021-07-14 18:18:16

利用go-zero在Go中快速实现JWT认证的步骤详解
2024-05-28 15:22:20
14道基础Python练习题(附答案)
2023-07-23 02:27:41

浅谈webpack对样式的处理
2024-04-23 09:06:51
UCenter 批量添加用户的php代码
2024-05-11 09:25:09
使用php get_headers 判断URL是否有效的解决办法
2023-11-24 00:02:50
System.Data.OleDb.OleDbDataAdapter与System.Data.OleDb.OleDbDataReader的区别是什么?
2009-10-29 12:17:00
Python 3.x踩坑实战汇总
2021-04-21 12:25:47
Golang解析JSON遇到的坑及解决方法
2024-05-10 13:58:29
Python中变量交换的例子
2021-04-02 13:28:36
JavaScript使用math.js进行精确计算操作示例
2024-04-10 10:54:41
golang中new与make的区别讲解
2024-05-09 14:55:15

Matplotlib 生成不同大小的subplots实例
2022-12-22 03:16:26

服务器响应HTTP的类型ContentType大全
2007-10-23 10:21:00
快速解决Golang Map 并发读写安全的问题
2024-04-30 10:03:46

用python删除文件夹中的重复图片(图片去重)
2021-07-23 22:42:36
Python实现时间序列可视化的方法
2021-03-07 20:42:00

JS中的public和private对象,即static修饰符
2023-08-29 21:53:13
DW MX 的快键一览表
2009-07-21 12:47:00
PIL对上传到Django的图片进行处理并保存的实例
2023-04-03 12:40:04