Vue + ElementUI

创建工程

1.命令行进入目录，创建一个名为 hello-vue 的项目，一路选 no

vue init webpack hello-vue

2.安装依赖，需要安装：

vue-router
element-ui
sass-loader
node-sass

//进入目录
cd hello-vue

//安装路由 vue-router
npm install vue-router --safe-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 --safe-dev

//启动测试
npm run dev

src 目录下创建 views router 文件夹
在 views 文件夹下创建 Login.vue 和 Main.vue

Main.vue

<template>
    <h1>首页</h1>
</template>

<script>
    export default {
        name: "Main"
    }
</script>

<style scoped>

</style>

<template>
  <div>
    <el-card class="box-card">
          <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-card>

    <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;
          }
        });
      },
      handleClose: function () {
          console.log("Handle Close，空函数");
      }
    }
  }
</script>


<style scoped>.box-card {width: 480px;margin: auto;}</style>；

5.在 router 文件夹下新建 index.js 文件

index.js

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',
        name: 'login',
        component: Login
      },
      {
        path: '/main',
        name: 'main',
        component: Main
      }

    ]
});

在 main.js 中导入组件

main.js

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

import router from './router'
//导入 element-ui 及 css
import Element from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'

Vue.use(Element);

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  render: h => h(App)  //ElementUI
})

7.在 App.vue 中使用

<template>
  <div id="app">
    <router-link to="login">登录</router-link>
    <router-link to="main">首页</router-link>
    <router-view></router-view>
  </div>
</template>

<script>

export default {
  name: 'App',
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

8.最终效果（使用 element-ui 实现）