html 标签的自定义属性应用 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>

    <script>
        window.onload = function(){
            var aBtn = document.getElementsByTagName('input');
            console.log(aBtn);
            var arr = ['A','B','C','D'];

            for(var i=0; i< aBtn.length; i++){
            aBtn[i].num = 0;
            aBtn[i].onclick = function(){
                this.value = arr[this.num];
                this.num++;
                if (this.num === arr.length){
                    this.num = 0;
                }
            };
            };

        };
        
    </script>
</head>
<body>
    <input type="button" value="0">
    <input type="button" value="0">
    <input type="button" value="0">

</body>
</html>

 

posted @ 2019-09-23 14:37  AngDH  阅读(760)  评论(0)    收藏  举报