element-ui使用

创建项目
```
vue init webpack hello-vue
cd hello-vue
npm install vue-router --save-dev
npm i element-ui -S      //element-ui
npm install      //安装依赖
npm install sass-loader node-sass --save-dev //安装sass加载器
npm run dev      //测试
```
- npm install moduleName：安装模块到项目目录下
- npm install -g moduleName：-g 的意思是将模块安装到全局，具体安装到磁盘哪个位置，要看 npm config prefix 的位置
- 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
初始化
- assets：用于存放资源文件
- components：用于存放 Vue 功能组件
- views：用于存放 Vue 视图组件
- router：用于存放 vue-router 配置

views文件夹

Main.vue

<template>
  <div>
    <el-container>
      <el-aside width="200px">
        <el-menu :default-openeds="['1']">
          <el-submenu index="1">
            <template slot="title"><i class="el-icon-caret-right"></i>用户管理</template>
            <el-menu-item-group>
              <el-menu-item index="1-1">
                <router-link to="/user/profile">个人信息</router-link>
              </el-menu-item>
              <el-menu-item index="1-2">
                <router-link to="/user/list">用户列表</router-link>
              </el-menu-item>
            </el-menu-item-group>
          </el-submenu>
          <el-submenu index="2">
            <template slot="title"><i class="el-icon-caret-right"></i>内容管理</template>
            <el-menu-item-group>
              <el-menu-item index="2-1">分类管理</el-menu-item>
              <el-menu-item index="2-2">内容列表</el-menu-item>
            </el-menu-item-group>
          </el-submenu>
        </el-menu>
      </el-aside>

      <el-container>
        <el-header style="text-align: right; font-size: 12px">
          <el-dropdown>
            <i class="el-icon-setting" style="margin-right: 15px"></i>
            <el-dropdown-menu slot="dropdown">
              <el-dropdown-item>个人信息</el-dropdown-item>
              <el-dropdown-item>退出登录</el-dropdown-item>
            </el-dropdown-menu>
          </el-dropdown>
        </el-header>

        <el-main>
          <router-view />
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

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

<style scoped lang="scss">
  .el-header {
    background-color: #f9a2c9;
    color: #333;
    line-height: 60px;
  }

  .el-aside {
    color: #333;
  }
</style>

<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，需要在 el-form-item 元素中增加 prop 属性
        rules: {
          username: [
            {required: true, message: '账号不可为空', trigger: 'blur'}
          ],
          password: [
            {required: true, message: '密码不可为空', 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>

router文件夹

index.js

import Vue from 'vue'
import Router from 'vue-router'
import Main from '../views/Main'
import Login from '../views/Login'
import UserProfile from '../views/user/Profile'
import UserList from '../views/user/List'

Vue.use(Router);

export default new Router({
  routes: [
    {
      path: '/main',
      component: Main,
      //嵌套路由
      children: [
        {
          path: '/user/Profile',
          component: UserProfile
        },
        {
          path: '/user/List',
          component: UserList
        },
      ]

    },
    {
      path: '/login',
      component: Login
    },
  ]
})

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);

Vue.config.productionTip = false

new Vue({
  el: '#app',
  router,
  render: h => h(App)  //ElementUI
})

App.vue

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

<script>

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

遇到的错误

Module build failed: TypeError: this.getResolve is not a function
at Object.loader

出现原因:当前sass的版本太高，webpack编译时出现了错误

解决:把package.json里的"sass-loader"设为 "^7.3.1",再重新npm install即可

路由嵌套

在views下新建user文件夹

Profile.vue

<template>
  <h1>用户信息</h1>
</template>

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

<style scoped>

</style>

List.vue

<template>
    <h1>用户列表</h1>
</template>

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

<style scoped>

</style>

[vue]element-ui使用

element-ui使用

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