在实战案例中vue组件使用

<el-carousel :interval="3000" type="card" height="200px" class="common-mt-md">
   <el-carousel-item v-for="item in movieArr" :key="item.id" class="text-center">
    <img v-bind:src="item.images.small" alt="电影封面" class="ticket-index-movie-img">
   </el-carousel-item>// 实际显示的内容-跑马灯
   <p v-if="!movieArr.length" class="ticket-index-movie-loading">
    <span class="el-icon-loading "></span>
   </p>// 当 movirArr的数组为空的时候，做出的预加载 loading 
</el-carousel>

<p v-if="!multipleSelection.length">
  <el-button type="success" round disabled>导出</el-button>
</p><!-- 不能点， 判断数组为空 -->
<p v-else>
  <el-button type="success" round >导出</el-button>
</p><!-- 可以点， 判断数组为不为空 -->

<el-form-item label="时间" prop="name">
  <el-input v-model="ruleForm.name"></el-input>//绑定模型，检测输入的格式
  <span class="el-icon-plus ticket-manage-timeinput" @click="addTime(this)"></span>//绑定方法，增加dom的操作
 </el-form-item> 
<el-form-item label="时间" prop="name" v-for="item in timeArr" :key='item.id'>  //timeArr数组与数据就渲染下面的dom，没有就不显示
　　<el-input v-model="ruleForm.name"></el-input> 
　　<span class="el-icon-minus ticket-manage-timeinput" @click="minusTime(this)"></span> 
</el-form-item>

 timeInputString: '<el-input v-model="ruleForm.name"></el-input><span class="el-icon-minus"></span>'

 addTime () {
 this.timeArr.push('str')
 },
 minusTime () {
 this.timeArr.shift('str')
 }

<li v-for="section in item.sections" :key='section.id' @click="hideParMask" :class="getSectionId(section.id)">
 <router-link :to="{ name: 'learning', params: { sectionId: section.id}, query: { courseId: courseId}}" >
   <span>{{item.orderInCourse}}.{{section.sectionNumber}}</span>
   <span>{{section.name}}</span>
 </router-link>
</li>

getSectionId (sectionId) {
 return {
  active: this.$route.params.sectionId === sectionId,
 }
}

getSectionId (sectionId) {
 return {
  active: this.$route.params.sectionId === sectionId,
 }
}

<v-child :courseId="courseId" v-on:receiveTitle="receiveTitle"></v-child>

methods: {
 receiveTitle (name) {
  this.titleName = name; // titleName 就是 **@课程
 }
}

<course-tab :courseList = courseList ></course-tab>

courseList().then(res => {
 this.courseList = res.data.courses;
 }).catch( err => {
 console.log(err)
});

 props: {
  courseList: {
   type: Array
  }
 }

{
  path: '*',
  redirect: '/'
}

router.push({ path: 'login-regist' })  // 如果这样写的话，会寻找路由最近的 / 然后在后面直接拼接login-regist；
为了防止在多级嵌套路由里面出现bug ,应该写全路由的全部信息，包括 /
router.push({ path: '/login-regist' })

<p class="img" :style="{background: 'url(' + item.logoFileURL + ')'}"></p>

data () {
  return {
   scrolled: false，
　　　　show: true
  }
},
methods: {
  handleScroll () {
   this.scrolled = window.scrollY > 0;
   if (this.scrolled) {
    this.show = false;
   }
  }
 },
 mounted () {
  window.addEventListener('scroll', this.handleScroll);
 }

@input="search"，

<el-input v-model="input" @keyup.enter.native="add" placeholder="请输入内容" ></el-input>