<style scoped>
  div{
    /*width: 100px;*/
    height: 20px;
    background-color: #138a97;
    color:#fff;
    /*子绝父相定位*/
    position: absolute;
    bottom:0;
    left:20px;
  }
</style>
<template>
  <div>
    <!--父组件传给子组件的内容-->
    {{content}}
  </div>
</template>
<script>
  export default {
    data(){
      return{

      }
    },
//    父组件传给子组件的内容
    props:["content"]
  }
</script>

<template>
  <div class="hello">
    <ul>
      <li v-for="(item,index) in list" v-on:mouseenter="aaa(index)">
        {{item.id}}{{item.item}}
        <!--若index == ishow，就添加该window组件-->
        <window :content="content" v-if="index == ishow"></window>
      </li>
    </ul>

  </div>
</template>

<script>
//  引入window组件
  import window from ‘./window.vue‘
export default {

  data () {
    return {
      content:"",
      ishow:null,
      list:[
        {id:1,item:"男人歌"},
        {id:2,item:"唱歌的孩子"},
        {id:3,item:"失恋重修手册"},
        {id:4,item:"paper love"},
        {id:5,item:"oops"},
        {id:6,item:"wild one"},
      ]
    }
  },
  methods:{
    aaa(index){
      this.content = this.list[index].item
      this.ishow = index
    }
  },
  components:{
//    子组件引入
    window
  }
}
</script>
<style scoped>
  li{
    list-style: none;
    height:50px;
    border:1px solid #2c3e50;
    /*定位，显示的内容才能出现才固定位置*/
    position: relative;
  }
</style>