vue实现验证码倒计时功能

 <el-button v-bind:class="{grey:isGrey,blue:!isGrey}" 
            v-bind:disabled="dis" type="primary" 
            @click="getCode">
      <span v-if="show">发送验证码</span>
      <span v-else>重新发送({{count}}s)</span>
  </el-button>

<script>
export default {
  data() {
    return {
      dis: false,
      show: true,
      isGrey: false, //按钮样式
      timer: null, //设置计时器,
      count: ""
    };
  },
  methods: {
    getCode() {
      let TIME_COUNT = 60;
      if (!this.timer) {
        this.count = TIME_COUNT;
        this.isGrey = true;
        this.show = false;
        this.dis = true;
        this.timer = setInterval(() => {
          if (this.count > 0 && this.count <= TIME_COUNT) { 
            this.count--;
          } else {
            this.dis = false;
            this.isGrey = false;
            this.show = true;
            clearInterval(this.timer);
            this.timer = null;
          }
        }, 1000);
      }
    }
  }
};
</script>

 .grey{
    background-color: #EDEEF1;
    border-color: #EDEEF1;
    color:#666;
    width: 30%;
  }
  .blue{
    background-color: #64A0DD;
    border-color: #64A0DD;
  }