label {
 font-size: 25px;
 cursor: pointer;
 position: absolute;
 top: -10px;
 right: 0px;
 z-index: 150;
}
 
label i {
 font-size: 15px;
 font-style: normal;
 display: inline-block;
 width: 18px;
 border-radius: 15px;
 height: 18px;
 text-align: center;
 line-height: 18px;
 color: #fff;
 vertical-align: middle;
 margin: -2px 2px 1px 0px;
 border: #53c7f0 1px solid;
}
 
input[type="checkbox"],
input[type="radio"] {
 display: none;
 outline: none;
}
 
input[type="radio"]+i {
 border-radius: 7px;
}
 
input[type="checkbox"]:checked+i,
input[type="radio"]:checked+i {
 background: #fff;
 color: #53c7f0;
}

 <div class="t-recommed-r" v-for="(item,index) in list" :key="index">
  <p><span></span> {{ item.name }} <span></span></p>
  <ul>
   <li v-for="(val,key) in item.data" :key="key" @click="checkTab(val.id)">
   <label v-for="(v, k) in checkedList" :key="k" v-show="val.id === v">
    <input type="checkbox" :checked="val.id === v">
    <i>"@/assets/images/null.png"><em>{{ val.name }}</em></a>
   </li>
  </ul>
  </div>

data () {
 return {
  checkedList: [],
  list: []
 }
 },
methods: {
 checkTab (id) {
  let index = this.checkedList.indexOf(id)
  if (index === -1) {
  this.checkedList.push(id)
  } else {
  this.checkedList.splice(index, 1)
  }
 },
}
// 如果存在数组中,那么进行删除操作, 如果不存在,则放入数组中

showPrintData: function() {
 var id = this.checkedList[0].id;
 axios.post(this.$api.contentGet, { id: id }).then(res => {
 this.contentTxt = res.body.txt;
 this.dialogFormVisible=true;
 });
},

<el-dialog :visible.sync="dialogFormVisible">
 <div ref="print" v-html="contentTxt">
 {{contentTxt}}
 </div>
 <div slot="footer" class="dialog-footer">
 <el-button type="primary" @click="printData()">打印</el-button>
 </div>
</el-dialog>

printData: function() {
 this.$print(this.$refs.print);
},