vue.js动态面包屑
最近在学习vue,正好手上有个项目还是用jquery写的,就自己尝试将这个项目的前端用vue实现,途中遇到了动态面包屑的问题,特此记录一下,如有不对的地方,欢迎指正.
需求描述:
点击左侧的导航,跳转到不同的页面,并且根据导航的路径,动态生成面包屑.面包屑的数据均来自于左侧的导航.
思路:1.面包屑作为一个单独的组件,在页面中引入.页面的结构如下:
2.面包屑组件的实现:
3.每次路由更新的时候,更新面包屑的数据:
//main.js
router.beforeEach( (to, from, next) => { //这里用到导航守卫
store.commit('setCurrRouteNme', {currRouteNme:to.name});
store.dispatch('setMenuList').then( ()=> { //因为面包屑的数据来自左侧菜单,这边先获取左侧导航数据然后根据当前路径生成面包屑
store.dispatch('setBreadCrumb');
});
next();
}) //store.js
import Vue from 'vue'
import Vuex from 'vuex'
import axios from 'axios'
Vue.use(Vuex)
export default new Vuex.Store({
state: {
currRouteNme: String,
oriMenuList:Array,
menuList:Array,
breadCrumbList:Array,
},
mutations: {
setCurrRouteNme( state, payload ) {
state.currRouteNme = payload.currRouteNme
},
setMenuList( state, payload) {
state.menuList = payload.menuList
},
setOriMenuList( state, payload) {
state.oriMenuList = payload.oriMenuList
},
setBreadCrumb( state, payload) {
state.breadCrumbList = payload.breadCrumbList
},
},
actions: { //因为数据是异步请求获取的,所以改变state要通过dispatch,commit只能处理同步数据
setMenuList ( {commit} ) {
let menuList;
return new Promise ( (resolve) => {
axios(url).then( res => { //url是请求菜单数据的接口
menuList = res.data.authList.map(({id,symbol,pId,forward,resName,isLeaf})=>{
return {
id,
symbol,
pId,
forward,
label:resName,
isLeaf:isLeaf,
icon:isLeaf == 1?'':'el-icon-goods'
}
});
commit('setOriMenuList', {
oriMenuList: menuList
});
//这边是为了左侧菜单而进行的数据处理,可忽略
let menuTree = menuList.reduce(function (prev, item) {
prev[item.pId] ? prev[item.pId].push(item) : prev[item.pId] = [item];
return prev;
}, {});
for (let parentItem in menuTree) {
menuTree[parentItem].forEach(function (item) {
item.children = menuTree[item.id] ? menuTree[item.id] : null;
});
}
commit('setMenuList', {
menuList: menuTree[0]
});
resolve();
})
})
},
setBreadCrumb ( {commit, state} ) {
let currMenuList = state.oriMenuList;
let currMenu;
let breadCrumbPre = [];
for (let i=0; i