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1. Mock.js
前后端分离开发开发过程当中，经常会遇到以下几个尴尬的场景：
1. 老大，接口文档还没输出，我的好多活干不下去啊！
2. 后端小哥，接口写好了没，我要测试啊！
前后端分离之后，前端迫切需要一种机制，不再需要依赖后端接口开发，而今天的主角mockjs就可以做到这一点

Mock.js是一个模拟数据的生成器，用来帮助前端调试开发、进行前后端的原型分离以及用来提高自动化测试效率。

Mock模块
安装mockjs依赖
下载这个模块npm install mockjs -D
如果在package.json中能够找到的话就代表成功

引入
为了只在开发环境使用mock，而打包到生产环境时自动不使用mock，我们可以在env中做一个配置

 dev.env

'use strict'
const merge = require('webpack-merge')
const prodEnv = require('./prod.env')

module.exports = merge(prodEnv, {
  NODE_ENV: '"development"',
    MOCK:'true'
})

prod.env

'use strict'
module.exports = {
  NODE_ENV: '"production"',
    MOCK:'false'
}

main.js

process.env.MOCK && require('@/mock') 

导入一个文件

 index.js

import Mock from 'mockjs' //引入mockjs，npm已安装
import action from '@/api/action' //引入请求地址

//全局设置：设置所有ajax请求的超时时间，模拟网络传输耗时
Mock.setup({
    // timeout: 400  //延时400s请求到数据
    timeout: 200 - 400 //延时200-400s请求到数据
})

//引登陆的测试数据，并添加至mockjs
import loginInfo from '@/mock/json/login-mock.js'
let s1 = action.getFullPath('SYSTEM_USER_DOLOGIN')
Mock.mock(s1, "post", loginInfo)
// Mock.mock(s1, /post|get/i, loginInfo)

login-mock.js

// const loginInfo = {
//     code: -1,
//     message: '密码错误'
// }

//使用mockjs的模板生成随机数据
const loginInfo = {
    'code|0-1': 0,
    'msg|3-10': 'msg'
}
export default loginInfo;

 还要导入3个vue文件

 AppMain.vue

<template>
    <el-container class="main-container">
        <el-aside v-bind:class="asideClass">
            <LeftNav></LeftNav>
        </el-aside>
        <el-container>
            <el-header class="main-header">
                <TopNav></TopNav>
            </el-header>
            <el-main class="main-center">Main</el-main>
        </el-container>
    </el-container>
</template>

<script>
    // 导入组件
    import TopNav from '@/components/TopNav.vue'
    import LeftNav from '@/components/LeftNav.vue'

    // 导出模块
    export default {
        data(){
            return{
                asideClass : 'main-aside '
            }
        },
        components:{
            TopNav,LeftNav
        },
        created(){
            this.$root.Bus.$on('collapsed-side',(v)=>{
                this.asideClass=v ? 'main-aside-collapsed':'main-aside ';
            })
        }
    };
</script>
<style scoped>
    .main-container {
        height: 100%;
         100%;
        box-sizing: border-box;
    }

    .main-aside-collapsed {
        /* 在CSS中，通过对某一样式声明! important ，可以更改默认的CSS样式优先级规则，使该条样式属性声明具有最高优先级 */
         64px !important;
        height: 100%;
        background-color: #334157;
        margin: 0px;
    }

    .main-aside {
         240px !important;
        height: 100%;
        background-color: #334157;
        margin: 0px;
    }

    .main-header,
    .main-center {
        padding: 0px;
        border-left: 2px solid #333;
    }
</style>

LeftNav.vue

<template>
    <el-menu default-active="2" class="el-menu-vertical-demo"  background-color="#334157"
     text-color="#fff" active-text-color="#ffd04b" :collapse="collapsed" >
        <!-- <el-menu default-active="2" :collapse="collapsed" collapse-transition router :default-active="$route.path" unique-opened class="el-menu-vertical-demo" background-color="#334157" text-color="#fff" active-text-color="#ffd04b"> -->
        <div class="logobox">
            <img class="logoimg" src="../assets/img/logo.png" alt="">
        </div>
        <el-submenu index="1">
            <template slot="title">
                <i class="el-icon-location"></i>
                <span>导航一</span>
            </template>
            <el-menu-item-group>
                <template slot="title">分组一</template>
                <el-menu-item index="1-1">选项1</el-menu-item>
                <el-menu-item index="1-2">选项2</el-menu-item>
            </el-menu-item-group>
            <el-menu-item-group title="分组2">
                <el-menu-item index="1-3">选项3</el-menu-item>
            </el-menu-item-group>
            <el-submenu index="1-4">
                <template slot="title">选项4</template>
                <el-menu-item index="1-4-1">选项1</el-menu-item>
            </el-submenu>
        </el-submenu>
        <el-menu-item index="2">
            <i class="el-icon-menu"></i>
            <span slot="title">导航二</span>
        </el-menu-item>
        <el-menu-item index="3" disabled>
            <i class="el-icon-document"></i>
            <span slot="title">导航三</span>
        </el-menu-item>
        <el-menu-item index="4">
            <i class="el-icon-setting"></i>
            <span slot="title">导航四</span>
        </el-menu-item>
    </el-menu>
</template>
<script>
    export default {
        data(){
            return{
                collapsed:false
            }
        },
        //
        created(){
            this.$root.Bus.$on('collapsed-side',(v)=>{
                this.collapsed=v;
            })
        }
    }
</script>
<style>
    .el-menu-vertical-demo:not(.el-menu--collapse) {
         240px;
        min-height: 400px;
    }

    .el-menu-vertical-demo:not(.el-menu--collapse) {
        border: none;
        text-align: left;
    }

    .el-menu-item-group__title {
        padding: 0px;
    }

    .el-menu-bg {
        background-color: #1f2d3d !important;
    }

    .el-menu {
        border: none;
    }

    .logobox {
        height: 40px;
        line-height: 40px;
        color: #9d9d9d;
        font-size: 20px;
        text-align: center;
        padding: 20px 0px;
    }

    .logoimg {
        height: 40px;
    }
</style>

 TopNav.vue

<template style="margin-top: -100px;">
    <!-- <el-menu :default-active="activeIndex2" class="el-menu-demo" mode="horizontal" @select="handleSelect" background-color="#545c64"
     text-color="#fff" active-text-color="#ffd04b">
        <el-menu-item index="1">处理中心</el-menu-item>
        <el-submenu index="2">
            <template slot="title">我的工作台</template>
            <el-menu-item index="2-1">选项1</el-menu-item>
            <el-menu-item index="2-2">选项2</el-menu-item>
            <el-menu-item index="2-3">选项3</el-menu-item>
            <el-submenu index="2-4">
                <template slot="title">选项4</template>
                <el-menu-item index="2-4-1">选项1</el-menu-item>
                <el-menu-item index="2-4-2">选项2</el-menu-item>
                <el-menu-item index="2-4-3">选项3</el-menu-item>
            </el-submenu>
        </el-submenu>

        <el-menu-item index="3" disabled>消息中心</el-menu-item>
        <el-menu-item index="4"><a href="https://www.ele.me" target="_blank">订单管理</a></el-menu-item>
    </el-menu> -->
    <el-menu class="el-menu-demo" mode="horizontal" background-color="#334157" text-color="#fff" active-text-color="#fff">
        <el-button class="buttonimg">
            <img class="showimg" :src="collapsed?imgshow:imgsq" @click="doToggle()">
        </el-button>
        <el-submenu index="2" class="submenu">
            <template slot="title">超级管理员</template>
            <el-menu-item index="2-1">设置</el-menu-item>
            <el-menu-item index="2-2">个人中心</el-menu-item>
            <el-menu-item @click="exit()" index="2-3">退出</el-menu-item>
        </el-submenu>
    </el-menu>
</template>

<script>
    export default {
        data(){
            return{
                collapsed:false,
                imgsq:require('../assets/img/sq.png'),
                imgshow:require('../assets/img/show.png')
            }
        },
        methods: {
            doToggle(){
                this.collapsed = !this.collapsed;
                 this.$root.Bus.$emit("collapsed-side", this.collapsed);
            },
            exit(){
                this.$router.push({
                    path:'/login'
                })
            }
        }
    }
</script>

<style scoped>
    .el-menu-vertical-demo:not(.el-menu--collapse) {
        border: none;
    }

    .submenu {
        float: right;
    }

    .buttonimg {
        height: 60px;
        background-color: transparent;
        border: none;
    }

    .showimg {
         26px;
        height: 26px;
        position: absolute;
        top: 17px;
        left: 17px;
    }

    .showimg:active {
        border: none;
    }
</style>

再去index.js中配置

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import Login from '@/views/Login'
import Reg from '@/views/Reg'
import AppMain from '@/components/AppMain'
import LeftNav from '@/components/LeftNav'
import TopNav from '@/components/TopNav'
Vue.use(Router)

export default new Router({
    routes: [{
            path: '/',
            name: 'Login',
            component: Login
        },
        {
            path: '/Login',
            name: 'Login',
            component: Login
        },
        {
            path: '/Reg',
            name: 'Reg',
            component: Reg
        },
        {
            path: '/AppMain',
            name: 'AppMain',
            component: AppMain,
            children: [{
                    path: '/LeftNav',
                    name: 'LeftNav',
                    component: LeftNav
                },
                {
                    path: '/TopNav',
                    name: 'TopNav',
                    component: TopNav
                }
            ]
        }


    ]
})

接下来我们看看效果