<div id="example">
 <button @click="send">
 <span v-if="sendMsgDisabled">{{time+'秒后獲取'}}</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, // 發送驗證碼倒計時
 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);
 }
 }
 })