vuejs2.0如何获取dom元素自定义属性值

<ul class="header-ul">
          <li class="flexcss" v-for="(list,index) in child" :data-value="list.name" @click="changeContent(index,list.name)">{{list.name}}</li>
        </ul>

methods: {
          changeHeaderContent(index,name){
              console.log(‘cht‘,index)
              console.log(‘chaname‘,name)
}

<div class="c-img-box" @click="gotoDetail(name)" :data-value="name">

data () {
    return {
      msg: ‘Welcome to Your Vue.js App‘,
      name:‘czj‘,
    }
  },

gotoDetail:function(ev){
      console.log(ev);
    },