知识补充

yarn和npm区别

npm的缺点：

1. npm install时候巨慢
2. 同一个项目，安装的时候无法保持一致性。 由于package.json文件中版本号的特点。

“5.0.3” 安装指定的5.0.3版本
“~5.0.3” 表示安装5.0.X中最新的版本
“^5.0.3” 表示安装5.X.X中最新的版本

有时候会出现版本不一致不能运行的情况。

yarn的优点

1. 速度快
   并行安装：同步执行所有任务，不像npm按照队列执行每个package，package安装不完成，后面也无法执行。
   离线模式：安装过得软件包，直接从缓存中获取，不用像npm从网络中获取。
2. 安装版本统一
3. 更简洁的输出：
   npm输出所有被安装上的依赖，但是yarn只打印必要的信息
4. 多注册来源处理：安装某个包，只会从一个注册来源去安装，
5. 更好的语义化，yarn安装和卸载是yarn add/remove,npm是npm install/uninstall

npm查看镜像和设置镜像

npm config get registry
npm config set registry https://registry.npmmirror.com/

项目介绍

项目的技术栈

1. 使用yarn安装vue-cli

yarn global add @vue/cli

项目搭建

先vue create创建一个项目，然后安装element-ui组件和vue-router,less等组件

文件目录

创建路由，引入element-ui

router/index.js

import VueRouter from "vue-router";
import Login from "@/pages/Login.vue";
import Users from "@/pages/Users.vue";
import Main from '@/pages/Main.vue'
import Home from "@/pages/Home.vue";const router= new VueRouter({// 浏览器模式设置，设置为history模式mode:'history',routes:[{path:"/login",component:Login,meta:{title:"登录"},},{// 主路由name:"main",path:'/',component:Main,children:[  //子路由{name:"users",path:"users",component:Users,meta:{title:"用户"}},{name:"home",path:"home",component:Home,meta:{title:"主页"}}]}]
})// 后置路由守卫
router.afterEach((to,from)=>{document.title=to.meta.title||"通用后台管理系统"
})
export default router

main.js

import Vue from 'vue'
import App from './App.vue'
import VueRouter from "vue-router";
import router from "@/router";
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css'
Vue.config.productionTip = false
Vue.use(VueRouter)
Vue.use(ElementUI)
new Vue({router,render: h => h(App),
}).$mount('#app')

pages/Users.vue

<template><div>我是Users组件</div></template><script>
export default {name: "Users",
}
</script><style scoped></style>

pages/Main.vue

<template><div><h1>main</h1><router-view></router-view></div></template><script>
export default {name: "Main",
}
</script><style scoped></style>

pages/Home.vue

<template><div>home内容</div></template><script>
export default {name: "Home",
}
</script><style scoped></style>

pages/Login.vue

<template><div id="app"><div class="main-content"><div class="title">系统登录</div><div class="content"><el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm"><el-form-item label="用户名" prop="name"><el-input v-model="ruleForm.name" ></el-input></el-form-item><el-form-item label="密码" prop="password"><el-input v-model="ruleForm.password" type="password" autocomplete="off"></el-input></el-form-item><el-form-item><el-row :gutter="20"><el-col :span="12" :offset="4"><router-link to="/login"><el-button type="primary" @click="submitForm('ruleForm')">登录</el-button></router-link></el-col></el-row></el-form-item></el-form></div></div></div></template><script>
export default {name: "login",data(){return{ruleForm: {name: '',password:""},rules: {name: [{required: true, message: '请输入用户名', trigger: 'blur'},{min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur'}],password: [{required:true,message:"请输入密码",trigger:"blur"}]}}},methods:{submitForm(formName) {this.$refs[formName].validate((valid) => {if (valid) {// alert('submit!');} else {console.log('error submit!!');return false;}});},}
}
</script><style lang="less" scoped>
*{padding: 0;margin: 0;
}
#app {display: flex;background-color: #333;height: 800px;.main-content{height: 300px;width: 400px;background-color: #fff;margin: 200px auto;border-radius: 10px;padding: 30px;box-sizing: border-box;box-shadow: 5px  5px 10px rgba(0,0,0,0.5),-5px -5px 10px rgba(0,0,0,0.5);.title{font-size: 20px;text-align: center;//margin-top: 30px;font-weight: 300;}.content{margin-top: 30px;}}
}
</style>

App.vue

<template><div id="app"><router-view></router-view></div>
</template><script>export default {name: 'App',
}
</script><style lang="less">
*{padding: 0;margin: 0;
}
</style>

使用element-ui搭建主页样式

main页面布局使用这个

Main.vue

<template><div><el-container><el-aside width="200px">Aside</el-aside><el-container><el-header>Header</el-header><el-main><router-view></router-view></el-main></el-container></el-container></div></template><script>
export default {name: "Main",
}
</script><style scoped></style>

导航栏使用

导航栏适配

Main.vue

<template><div><el-container><el-aside width="200px"><CommonAside></CommonAside></el-aside><el-container><el-header>Header</el-header><el-main>
<!--         路由出口，路由匹配到的组件将渲染在这里 --><router-view></router-view></el-main></el-container></el-container></div></template><script>
import CommonAside from "@/components/CommonAside.vue";
export default {name: "Main",components:{CommonAside}
}
</script><style scoped></style>

App.vue

<template><div id="app"><router-view></router-view></div>
</template><script>export default {name: 'App',
}
</script><style lang="less">
html,body,h3{padding: 0;margin: 0;
}
</style>

CommonAside

<template><el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose":collapse="isCollapse" background-color="#545c64" text-color="#fff"active-text-color="#ffd04b"><h3>通用后台管理系统</h3><el-menu-item index="2" v-for="item in noChildren" :key="item.name" :index="item.name"><i :class="`el-icon-${item.icon}`"></i><span slot="title">{{item.label}}</span></el-menu-item><el-submenu :index="item.label" v-for="item in hasChildren" :key="item.label"><template slot="title"><i :class="`el-icon-${item.icon}`"></i><span slot="title">{{item.label}}</span></template><el-menu-item-group><el-menu-item :index="subItem.path" :key="subItem.path" v-for="subItem in item.children">{{subItem.label}}</el-menu-item></el-menu-item-group></el-submenu></el-menu></template><style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {width: 200px;min-height: 400px;
}
.el-menu{height: 100vh;  //占据页面高度100%h3{color: #fff;text-align: center;line-height: 48px;font-size: 16px;font-weight: 400;}
}
</style><script>
export default {data() {return {isCollapse: false,menuData:[{path:'/',name:"home",label:"首页",icon:"s-home",url:'Home/Home'},{path:'/mail',name:"mall",label:"商品管理",icon:"video-play",url:'MallManage/MallManage'},{path:'/user',name:"user",label:"用户管理",icon:"user",url:'userManage/userManage'},{label:"其他",icon:"location",children:[{path:'/page1',name:"page1",label:"页面1",icon:"setting",url:'Other/PageOne'},{path:'/page2',name:"page2",label:"页面2",icon:"setting",url:'Other/PageTwo'},]},]};},methods: {handleOpen(key, keyPath) {console.log(key, keyPath);},handleClose(key, keyPath) {console.log(key, keyPath);}},computed:{//没有子菜单的数据noChildren(){return this.menuData.filter(item=>!item.children)},hasChildren(){return this.menuData.filter(item=>item.children)}//有子菜单数组}
}
</script>

导航栏跳转

文件目录

src/router/index.js

import VueRouter from "vue-router";
import Login from "@/pages/Login.vue";
import Users from "@/pages/Users.vue";
import Main from '@/pages/Main.vue'
import Home from "@/pages/Home.vue";
import Mall from "@/pages/Mall.vue";
import PageOne from "@/pages/PageOne.vue";
import PageTwo from "@/pages/PageTwo.vue";const router= new VueRouter({// 浏览器模式设置，设置为history模式// mode:'history',routes:[{path:"/login",component:Login,meta:{title:"登录"},},{// 子路由name:"main",path:'/',redirect:"/home",  //重定向 当路径为/，则重定向homecomponent:Main,children:[{name:"user",path:"user",component:Users,meta:{title:"用户管理"}},{name:"home",path:"home",component:Home,meta:{title:"首页"}},{name:"mall",path:"mall",component:Mall,meta:{title:"商品管理"}},{name:"page1",path:"page1",component:PageOne,meta:{title:"页面1"}},{name:"page2",path:"page2",component:PageTwo,meta:{title:"页面2"}}]}]
})// 后置路由守卫
router.afterEach((to,from)=>{document.title=to.meta.title||"通用后台管理系统"
})
export default router

src/pages/Mall.vue

<template><div>我是mall</div></template><script>
export default {name: "Mall",
}
</script><style scoped></style>

src/pages/pageOne.vue

<template><div>我是PageOne</div></template><script>
export default {name: "PageOne",
}
</script><style scoped></style>

src/pages/PageTwo.vue

<template><div>我是PageTwo</div></template><script>
export default {name: "PageTwo",
}
</script><style scoped></style>

src/components/CommonAside.vue

<template><el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose":collapse="isCollapse" background-color="#545c64" text-color="#fff"active-text-color="#ffd04b"><h3>通用后台管理系统</h3><el-menu-item @click="clickMenu(item)"  v-for="item in noChildren" :key="item.name" :index="item.name"><i :class="`el-icon-${item.icon}`"></i><span slot="title">{{item.label}}</span></el-menu-item><el-submenu :index="item.label" v-for="item in hasChildren" :key="item.label"><template slot="title"><i :class="`el-icon-${item.icon}`"></i><span slot="title">{{item.label}}</span></template><el-menu-item-group><el-menu-item @click="clickMenu(subItem)" :index="subItem.path" :key="subItem.path" v-for="subItem in item.children">{{subItem.label}}</el-menu-item></el-menu-item-group></el-submenu></el-menu></template><style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {width: 200px;min-height: 400px;
}
.el-menu{height: 100vh;  //占据页面高度100%h3{color: #fff;text-align: center;line-height: 48px;font-size: 16px;font-weight: 400;}
}
</style><script>
export default {data() {return {isCollapse: false,menuData:[{path:'/',name:"home",label:"首页",icon:"s-home",url:'Home/Home'},{path:'/mall',name:"mall",label:"商品管理",icon:"video-play",url:'MallManage/MallManage'},{path:'/user',name:"user",label:"用户管理",icon:"user",url:'userManage/userManage'},{label:"其他",icon:"location",children:[{path:'/page1',name:"page1",label:"页面1",icon:"setting",url:'Other/PageOne'},{path:'/page2',name:"page2",label:"页面2",icon:"setting",url:'Other/PageTwo'},]},]};},methods: {handleOpen(key, keyPath) {console.log(key, keyPath);},handleClose(key, keyPath) {console.log(key, keyPath);},clickMenu(item){// console.log(item)this.$router.push(item.path)}},computed:{//没有子菜单的数据noChildren(){return this.menuData.filter(item=>!item.children)},//有子菜单数组hasChildren(){return this.menuData.filter(item=>item.children)}}
}
</script>