创建工程

1. 创建一个名为hello-vue的工程

  vue init webpack hello-vue

2. 安装依赖

需要安装 vue-router、element-ui、sass-loader和node sass 四个插件

  # 进入工程目录

  cd hello-vue

  # 安装vue-router

  npm install vue-router --save-dev

  # 安装element-ui

  npm i element-ui -S

  # 安装依赖

  npm install

  # 安装 SASS 加载器

  cnpm install sass-loader node-sass --save-dev

  # 启动测试,需将package.json中的sass-loader版本改为7.3.1 , node-sass改为4.14.1

  npm run dev

3. Npm指令解释

npm install moduleName：安装模块到项目下

npm install -g moduleName：-g的意思是将模块安装到全局

npm install -save moduleName：-save的意思是将模块安装到项目目录下，并在package文件的dependencies节点写入依赖，-S为该命令的缩写

npm install -save-dev moduleName：--save-dev的意思是将模块安装到项目目录下，并在 package 文件的 devDependencies 节点写入依赖，-D为该命令的缩写

main.js

  import Vue from 'vue'

  import App from './App'

  import router from './router'

  import ElementUI from 'element-ui'

  import 'element-ui/lib/theme-chalk/index.css'

  Vue.use(router);

  Vue.use(ElementUI);

  new Vue({

    el: '#app',

    router,

    render: h => h(App) //ElementUI

  })

index.js(路由配置)

  import Vue from 'vue'

  import Router from 'vue-router'

  import Main from '../views/Main'

  import Login from '../views/Login'

  Vue.use(Router)

  export default new Router({

    routes: [

      {

        path: "/login",

        component: Login

      },

      {

        path: "/main",

        component: Main

      }

    ]

  });

Login.vue

    <template>

      <div>

        <el-form ref="loginForm" :model="form" :rules="rules" label-width="80px" class="login-box">

          <h3 class="login-title">欢迎登录</h3>

          <el-form-item label="账号" prop="username">

            <el-input type="text" placeholder="请输入账号" v-model="form.username"/>

          </el-form-item>

          <el-form-item label="密码" prop="password">

            <el-input type="password" placeholder="请输入密码" v-model="form.password"/>

          </el-form-item>

          <el-form-item>

            <el-button type="primary" v-on:click="onSubmit('loginForm')">登录</el-button>

          </el-form-item>

        </el-form>

        <el-dialog

          title="温馨提示"

          :visible.sync="dialogVisible"

          width="30%"

          :before-close="handleClose">

          <span>请输入账号和密码</span>

          <span slot="footer" class="dialog-footer">

            <el-button type="primary" @click="dialogVisible = false">确 定</el-button>

          </span>

        </el-dialog>

      </div>

    </template>

    <script>

      export  default {

        name:"Login",

        data(){

          return {

            form: {

              username: '',

              password: ''

            },

            //表单验证，需要再el-form-item 元素中增加prop属性

            rules: {

              username:[

                       {required:true,message:'账号不能为空',trigger:'blur'}

                        ],

            password:[

                  {required: true,message: '密码不能为空',trigger:'blur'}

                  ]

        },

          //对话框显示和隐藏

          dialogVisible:false

        }

        },

        methods:{

          onSubmit(formName) {

            //为表单绑定验证功能

            this.$refs[formName].validate((valid) =>{

              if (valid){

                //使用 vue-router路由到指定页面，该方式称之为编程式导航

                this.$router.push("/main");

              } else {

                this.dialogVisible = true;

                return false;

              }

            });

          }

        }

      }

    </script>

    <style lang="scss" scoped>

      .login-box{

        border: 1px solid #DCDFE6;

        width: 350px;

        margin:180px auto;

        padding:35px 35px 15px 35px;

        border-radius: 5px;

        -webkit-border-radius: 5px;

        -moz-border-radius: 5px;

        box-shadow:0 0 25px #909399;

      }

      .login-title{

        text-align:center;

        margin:0 auto 40px auto;

        color:#303133;

      }

    </style>

App.vue

<template>

  <div id="app">

    <router-view></router-view>

  </div>

</template>

<script>

export default {

  name: 'App'

}

</script>

Main.vue

<template>

  <h1>首页</h1>

</template>

<script>

  export default {

    name: "Main"

  }

</script>

<style scoped>

</style>