JavaScript 点击按钮div变透明 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        div {
            width: 300px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>
<body>
<div id="dv"></div>
<input type="button" id="bt" value="变透明"/>
<script src="common.js"></script>
<script>
    my$("bt").onclick = function () {
        var opacity = 10;
        var timeId = setInterval(function () {
            opacity--;
            if (opacity <= 0) {
                //清理定时器
                clearInterval(timeId);
            }
            my$("dv").style.opacity = opacity / 10;
        }, 200)
    };
</script>
</body>
</html>

 

posted @ 2018-08-01 17:04  {颜逸}  阅读(1236)  评论(0)    收藏  举报