Click the button to send the verification code and a countdown will appear.

Sometimes when we send a verification code, there will always be a countdown function. The following editor will bring you a simple example of clicking a button to send a verification code and a countdown will appear. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look, I hope it can help everyone.

The examples are as follows:

nbsp;html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
 
 
<script></script> 
<script> 
 
var InterValObj; //timer变量，控制时间 
var count = 30; //间隔函数，1秒执行 
var curCount;//当前剩余秒数 
 
function sendMessage() { 
 　curCount = count; 
　　//设置button效果，开始计时 
   $("#btnSendCode").attr("disabled", "true"); 
   $("#btnSendCode").val(curCount + "秒后可重新发送"); 
   InterValObj = window.setInterval(SetRemainTime, 1000); //启动计时器，1秒执行一次 
　　  
  //请求后台发送验证码 TODO 
 
} 
 
//timer处理函数 
function SetRemainTime() { 
      if (curCount == 0) {         
        window.clearInterval(InterValObj);//停止计时器 
        $("#btnSendCode").removeAttr("disabled");//启用按钮 
        $("#btnSendCode").val("重新发送验证码"); 
      } 
      else { 
        curCount--; 
        $("#btnSendCode").val(curCount + "秒后可重新发送"); 
      } 
    } 
</script> 
 
 
    <input> 
 

Have you learned it? Hurry up and try it out.

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