vue vuex vue-rouert后台项目――权限路由（适合初学）

webpack ---- 打包神器
vue ---- JavaScript 框架
vuex ---- 实现不同组件间的状态共享
vue-router ---- 页面路由
babel-polyfill ---- 将ES6代码转为ES5代码
normalize.css ---- 重置掉该重置的样式
element-ui ---- UI组件库

# cd 到项目文件夹
cd weven-simple-template
# 安装依赖 （本项目还安装了其他依赖详情 请见 package.json 文件）
npm install
# 运行项目
npm run dev

src
├── App.vue  ---- 页面入口
├── api  ---- api请求
│ └── login.js ---- 模拟json对象数据
├── assets  ---- 主题 字体等静态资源
│ └── logo.png
├── components ---- 组件
│ ├── index.vue
│ └── login.vue 
├── main.js  ---- 初始化组件 加载路由
├── router  ---- 路由
│ └── index.js
└── store  ---- vuex状态管理
 ├── getters.js
 ├── index.js
 └── modules
 └── login.js

// 初始化路由
export default new Router({ 
 routes: [
 {
 path: '/login',
 name: 'Login',
 component: Login
 }
 ] 
});
// 动态路由 meta 定义了role
export const powerRouter =[ 
 { path: '/',redirect:'/red', name: 'index',component: Index,hidden:false,
 children: [
 { path: '/red', name: 'red', component: red,},
 { path: '/yellow', name: 'yellow', component: yellow, meta: {role: 'B'}},
 { path: '/blue', name: 'blue', component: blue, meta: {role: 'C'}}
 ]
 }
];

Logins({ commit }, info){
  return new Promise((resolve, reject) => {
  let data={};
  loginByUserInfo.map(function (item) { //获取所以用户信息
   if(info.username === item.username || info.pew === item.pew){
   commit('SET_USERNAME',item.username); //将username和role进行存储
   sessionStorage.setItem('USERNAME', item.username); //存入 session 
   commit('SET_ROLE',item.role);
   sessionStorage.setItem('ROLE', item.role);
   return data={username:item.username,introduce:item.introduce};
   }else{
   return data;
   }
  }); 
  resolve(data);
 }).catch(error => {
  reject(error);
 });
 },
 Roles({ commit }, newrouter){
 return new Promise((resolve, reject) => {
  commit('SET_NEWROUER',newrouter); //存储最新路由
  resolve(newrouter);
 }).catch(error => {
  reject(error);
 });
 },

Logins({ commit }, info){
  return new Promise((resolve, reject) => {
  let data={};
  loginByUserInfo.map(function (item) { //获取所以用户信息
   if(info.username === item.username || info.pew === item.pew){
   commit('SET_USERNAME',item.username); //将username和role进行存储
   sessionStorage.setItem('USERNAME', item.username); //存入 session 
   commit('SET_ROLE',item.role);
   sessionStorage.setItem('ROLE', item.role);
   return data={username:item.username,introduce:item.introduce};
   }else{
   return data;
   }
  }); 
  resolve(data);
 }).catch(error => {
  reject(error);
 });
 },
 Roles({ commit }, newrouter){
 return new Promise((resolve, reject) => {
  commit('SET_NEWROUER',newrouter); //存储最新路由
  resolve(newrouter);
 }).catch(error => {
  reject(error);
 });
 },

router.beforeEach((to, from, next) => {
 if(store.getters.role){ //判断role 是否存在
 
 if(store.getters.newrouter.length !== 0){ 
  next() //resolve 钩子
 }else{
  let newrouter
  if (store.getters.role == 'A') { //判断权限
  newrouter = powerRouter
  } else {
  let newchildren = powerRouter[0].children.filter(route => {
   if(route.meta){
   if(route.meta.role == store.getters.role){
    return true
   }
   return false
   }else{
   return true
   }
  });
  newrouter = powerRouter
  newrouter[0].children = newchildren
  }
  router.addRoutes(newrouter) //添加动态路由
  store.dispatch('Roles',newrouter).then(res => { 
  next({ ...to })
  }).catch(() => { 

  })
 } 
 }else{
  if (['/login'].indexOf(to.path) !== -1) { 
  next()
 } else {
  next('/login')
 }
 }
})

// mapGetters 辅助函数仅仅是将 store 中的 getter 映射到局部计算属性
...mapGetters([
 'newrouter'
 ])