BOM 点击触发 倒计时发送验证码案例 

<!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">
    <button>发送</button>
    <script>
        //获取元素
        var btn = document.querySelector('button');
        var timer = 60;
        
        btn.addEventListener('click',function(){
            var tt= setInterval(function(){
            if(timer==0){
                clearInterval(tt);
                btn.disabled=false;
                btn.innerText='发送';
                timer=60;
            }else{
                btn.disabled=true;
                btn.innerText=timer+'重新发送'
                timer--;
            }
        },1000)
        })
    </script>
</body>
</html>

 

posted @ 2021-11-23 14:41  嘉琦  阅读(34)  评论(0)    收藏  举报