<!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>
手机号码:<input type="number"> <button>发送</button>
<script>
var btn = document.querySelector('button');
var time = 10;
btn.addEventListener('click',function(){
btn.disabled = true;
var timer = setInterval(function(){
if(time == 0){
//清除定时器和复原按钮
clearInterval(timer);
btn.disabled = false;
btn.innerHTML = '发送';
time = 10; //这里重新开始
}else{
btn.innerHTML = '还剩下'+time+'秒';
time--;
}
},1000)
})
</script>
</body>
</html>
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