Vue入门

Vue项目创建流程

创建工程

• 创建一个名为hello-vue的工程

  • vue init webpack hello-vue
    # vue build 选第一个
    # 后面选项一路no
    

• 安装依赖，我们需要安装 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
npm run dev


##############################################################
# 安装axios
cnpm install axios -s

npm命令解释

• 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

页面

新建

​ src/views

​ src/router

​ src/view/Main.vue

​ src/view/Login.vue

Main.vue

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

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

<style scoped>

</style>

Login.vue

<template>
  <div>
    <el-form ref="loginFrom" :model="form" :rules="rules" label-width="80px" class="login-box">
      <h3 class="login-title">欢迎登陆</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" @click="onSubmit('loginFrom')">登陆</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: ''
        },
        //表单检验
        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.$refs[formName].validate((valid) => {
          if (valid) {
            this.$router.push("/main");
          } else {
            this.dialogVisible = true;
            return false;
          }
        });
      },
      handleClose(formName) {
        this.$refs[formName].resetFields();
      }
    }
  }
</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>

配置路由

src/router/index.jsp

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

main.js

import Vue from 'vue'
import App from './App'
//导入扫描路由
import router from './router'
//导入element-ui
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';

Vue.config.productionTip = false

//安装
Vue.use(router);
Vue.use(ElementUI);

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

App.vue

<template>
  <div id="app">
    <router-view></router-view>
  </div>
</template>
<script>
export default {
  name: 'App'
}
</script>

运行测试

错误

原因 sass-loader版本过高

"sass-loader": "^8.0.2"
# 修改成
"sass-loader": "^7.3.1"
# 然后在npm install下