Js获取验证码倒计时

1.Jquery的实现：

/**
 * 倒计时
 * e 代表发送按钮对象
 */
function resetTime(e){
    var second = 60;
    var timer = null;
    timer = setInterval(function(){
        second -= 1;
        if(second >0){
            $(e).attr('disabled',true);
            $(e).text(second + "秒后获取验证码");
        }else{
            clearInterval(timer);
            $(e).attr('disabled',false);
            $(e).text("发送短信验证码");
        }
    },1000);
}

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2、在vue实现倒计时获取验证码效果：

这里我们没有使用setInterval，而使用setTimeout，每1秒钟递归来实现的。注意区别：

<template>
 <div>
  <el-button :disabled="disabled" @click="sendcode" class="sendcode">{{btntxt}}</el-button>
 </div>
</template>

<script>
 export default {
  data() {
   return {
    disabled: false,
    time: 5,
    btntxt: "发送验证码",
   };
  },
  methods: {
   sendcode() {
    this.time = 5;
    this.timer();
   },
   //发送手机验证码倒计时
   timer() {
    if (this.time > 0) {
     this.disabled = true;
     this.time--;
     this.btntxt = this.time + "秒";
     setTimeout(this.timer, 1000);
    } else {
     this.time = 0;
     this.btntxt = "发送验证码";
     this.disabled = false;
    }
   },
  }
 }
</script>

<style scoped>
 .el-button {
  margin: 100px 50px;
 }
</style>