效果如下，倒计时完了再成为蓝色状态

实现代码：

<el-button type="primary" :disabled="disable" :class="{ codeGeting:isGeting }" @click="getVerifyCode">{{getCode}}</el-button>

export default {
      name: "demo",
      data(){
        return{
          getCode:'获取验证码',
          isGeting:false,
          count:6,
          disable:false
        }
      },
      methods:{
        getVerifyCode(){
          var countDown = setInterval(()=>{
            if(this.count < 1){
              this.isGeting = false;
              this.disable = false;
              this.getCode = '获取验证码';
              this.count = 6;
              clearInterval(countDown);
            }else{
              this.isGeting = true;
              this.disable = true;
              this.getCode = this.count-- + 's后重发';
            }
          },1000);

        }
      }
    }

  .codeGeting{
    background: #cdcdcd;
    border-color: #cdcdcd;
  }