console 命令行工具 X clear

console

var Main = {
    data () {
      return {
        participant:[{
          name:'老方'
        },{
          name:'老张'
        },{
          name:'老王'
        },{
          name:'老李'
        }]
      };
    }
  }
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')

<script src="//unpkg.com/vue/dist/vue.js"></script>


<div id="app">
<template>
  <span v-for="(item,index) in participant">
    {{
      index == participant.length-1 && item.name || (item.name + ',')
    }}
    
  </span>
</template>
</div>