<div id="example">
  <button @click="send">
   <span v-if="sendMsgDisabled">{{time+'秒后获取'}}</span>
   <span v-if="!sendMsgDisabled">send</span>
  </button>
 </div>

 button {
  width: 100px;
  height: 50px background: pink;
 }

var vm = new Vue({
  el: '#example',
  data() {
   return {
    time: 60, // 发送验证码倒计时
    sendMsgDisabled: false
   }
  },
  methods: {
   send() {
    let me = this;
    me.sendMsgDisabled = true;
    let interval = window.setInterval(function() {
     if ((me.time--) <= 0) {
      me.time = 60;
      me.sendMsgDisabled = false;
      window.clearInterval(interval);
     }
    }, 1000);
   }
  }
 })