<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<input type="text" placeholder="请输入验证码">
<button>发送</button>
<script>
var btn=document.querySelector('button');
var i=5;
btn.addEventListener('click',function(){
var timer=setInterval(function(){
if(i!=0){
btn.innerHTML='还剩下'+i+'秒';
btn.disabled=true;
i--;
}else{
btn.innerHTML='发送';
btn.disabled=false;
i=5;
}
},1000)
})
</script>
</body>
</html>验证码小框款
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Origin blog.csdn.net/weiyuyang250/article/details/120756045
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