基于vue-cli创建后台管理系统前端页面——element-ui，axios，跨域配置，布局初步，导航栏

引出

1.vue-cli创建前端工程，安装element-ui，axios和配置；
2.前端跨域的配置，请求添加Jwt的设置；
3.进行初始化布局，引入新增页面的方式；
4.home页面导航栏的设置，一级目录，二级目录；

安装npm install

安装element-ui

npm i element-ui -S

安装axios

npm install axios

安装成功

进行配置

main.js中引入+添加jwt

import Vue from 'vue'
import App from './App.vue'
import router from './router'

import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
import axios from 'axios'

// axios的前端请求拦截器，每次都会加header

axios.interceptors.request.use(
  config => {
    let jwt = localStorage.getItem('jwt');
    if(jwt){
      config.headers.jwt = jwt; // {headers:{'jwt':jwt}}
    }
    return config;

  }
)

Vue.prototype.$axios = axios
Vue.use(ElementUI);

Vue.config.productionTip = false

new Vue({
  router,
  render: h => h(App)
}).$mount('#app')

前端跨域配置

const { defineConfig } = require('@vue/cli-service')
module.exports = defineConfig({
  transpileDependencies: true,
  devServer: {
    port: 8080,
      proxy: {
        "/api": { // 1.修改端口号
          // （后端服务器地址）
          target: 'http://127.0.0.1:10002',   // 2.配置代理服务器
          changeOrigin: true, // 3.允许跨域请求
          pathRewrite: {
            // '^/api': '/' // 4.把代理路径的api删除，类似正则表达
          }
        }
      }
    }
})

进行初始布局

HomeView.vue

<template>
  <el-container style="height: 100%">
    <el-header style="background-color: rgb(249, 195, 195);">Header</el-header>
    <el-container>
      <el-aside width="200px" style="background-color: rgb(241, 241, 202);">Aside</el-aside>
      <el-main style="background-color: rgb(182, 182, 231);">Main</el-main>
    </el-container>
  </el-container>

</template>

<script>
  export default{
    data() {
      return {};
    },
    methods: {}
    

}
</script>

<style scoped>

</style>

布局初步

App.vue

<template>
  <div id="app">
    <router-view/>
  </div>
</template>

<style>

*{
  padding: 0;
  margin: 0;
}
html,body,#app{
  height: 100%;
}

</style>

新增页面和引入

import Vue from 'vue'
import VueRouter from 'vue-router'
import HomeView from '../views/HomeView.vue'
const Login  = () => import ("../components/Login.vue")


Vue.use(VueRouter)

const routes = [
  {path: '/',name: 'login',component: Login},
  {path: '/home',name: 'home',component: HomeView},
]

const router = new VueRouter({
  routes
})

export default router

home页面导航栏

<template>
  <el-container style="height: 100%">
    <el-header style="background-color: rgb(249, 195, 195);">Header</el-header>
    <el-container>
      <el-aside width="200px" style="background-color: rgb(241, 241, 202);">
        <el-col width="200px">
          <el-menu
            default-active="2"
            class="el-menu-vertical-demo"
            @open="handleOpen"
            @close="handleClose">
            <el-submenu :index="menu.id" 
            v-for="menu in menuList" :key="menu.id">
              <template slot="title">
                <i :class="menu.icon"></i>
                <span>{{ menu.name }}</span>
              </template>
                <el-menu-item-group>
                  <el-menu-item :index="cmenu.link" 
                  v-for="cmenu in menu.childrenMenu" :key="cmenu.id">
                    {{ cmenu.name }}
                  </el-menu-item>
                </el-menu-item-group>
            </el-submenu>
          </el-menu>
      </el-col>

      </el-aside>
      <el-main style="background-color: rgb(182, 182, 231);">Main</el-main>
    </el-container>
  </el-container>

</template>

<script>
  export default{
    data() {
      return {

        // 定义一个数据，菜单从数据中循环出来table tr
        // 找出一级菜单和二级菜单循环体
        menuList:[
          {id:'1',name:'公共模块',icon:'el-icon-menu',
          childrenMenu:[
            {id:'2',name:'调查问卷',link:'abc'},
            {id:'3',name:'资料中心',link:'bcd'},
            {id:'4',name:'工资中心',link:'cde'},
          ]},
          {id:'5',name:'业务目标',icon:'el-icon-document',
          childrenMenu:[
            {id:'5',name:'短期目标',link:'def'},
            {id:'6',name:'长期目标',link:'efg'},
          ]},
        ]

      };
    },
    methods: {
      // 查询用户拥有菜单
      queryUserMenu(){
        this.$axios.get('/api/menu/queryAll')
        .then(response=>{
          let resp = response.data
          console.log(resp)
        })
      },

      handleOpen(key, keyPath) {
        console.log(key, keyPath);
      },
      handleClose(key, keyPath) {
        console.log(key, keyPath);
      }
    }
    

}
</script>

<style scoped>

</style>