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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:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
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>
</head>
<body>
<input id="btnSendCode" type="button" value="发送验证码" onclick="sendMessage()" /></p>
</body>
</html>
Have you learned it? Hurry up and try it out.
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