js之阻止事件冒泡(待修改)和阻止默认事件

时间：2024-01-19 23:53:08

阻止默认事件(event.stopPropagation()):

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<meta name="viewport" content="width=device-width,user-scalable=no" /><title></title>

<meta name="description" content="" />

<meta name="keywords" content="" />

<link href="/css/css.css" rel="stylesheet" type="text/css" />

<script>

window.onload=function(){

    var oA=document.getElementsByTagName("a")[0];

    oA.onclick=function(event){

        event.preventDefault();

        console.log("阻止了默认事件");

    };

}

</script>

</head>

<body>

<a>aaa</a>

</body>

</html>

阻止事件冒泡(event.stopPropagation()):

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title></title>

<meta name="description" content="" />

<meta name="keywords" content="" />

<script src="jquery-1.8.3.min.js"></script>

<script>

$(document).ready(function(){

    $("#btn").click(function(event){

        $("#z_body").slideDown(1000);

        event.stopPropagation();

    });

    $("#z_body").click(function(event){

        event.stopPropagation();

    });

    $(document).click(function(){

            $("#z_body").slideUp();

  })

});

</script>

<style>

*{margin:0px;padding:0px;}

body{max-320px;margin:0 auto;width:320px;}

#z_body{width:320px;height:auto;line-height:40px;background:#ccc;color:#000000;display:none;max-width:320px;margin-top:30px;}

#z_body ul{}

#z_body ul li{width:266px;;height:39px;line-height:39px;background:#40205d;border-top:1px solid #666666;border-bottom:1px solid #666666;list-style:none;font-size:16px;color:#fff;padding-left:54px;}

#btn{height:30px;display:block;text-align:center;font-weight:600;background:pink;width:320px;line-height:30px;position:fixed;top:0px;}

</style>

</head>

<body>

<a  id="btn">菜单</a>

<div id="z_body">

    <ul>

        <li>网站首页</li>

        <li>整形中心</li>

        <li>皮肤中心</li>

        <li>网站首页</li>

        <li>整形中心</li>

        <li>皮肤中心</li>

        <li>网站首页</li>

    </ul>

</div>

</body>

</html>

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