JQ-事件冒泡

2018-08-30  本文已影响0人  3e0a50393df8
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>事件冒泡</title>
    <style type="text/css">
        .grandfather{
            width: 300px;
            height: 300px;
            background-color: green;
            position: relative;
        }
        .father{
            width: 200px;
            height: 200px;
            background-color: gold;
        }
        .son{
            width: 100px;
            height: 100px;
            background-color: red;
            position: absolute;
            left: 0;
            top: 400px;
        }
    </style>
    <script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
    <script type="text/javascript">
        $(function(){
            $('body').click(function() {
                alert(4);
            });
            $('.grandfather').click(function() {
                alert(3);
            });
            $('.father').click(function() {
                alert(2);
            });
            $('.son').click(function(event) {//event代表当前事件
                alert(1);
                // console.log(event);//显示很多属性,其中clientX、clientY就是点击的坐标
                // alert("X轴坐标:" + event.clientX);

                // //阻止事件冒泡
                // event.stopPropagation();

                //合并阻止操作:把阻止冒泡和阻止默认行为合并
                return false;
            });

            //阻止右键菜单
            $(document).contextmenu(function(event){
                // //阻止默认行为(原来右键能弹出菜单,阻止后无法弹出)
                // event.preventDefault();

                //合并阻止
                return false;
            })
        })
    </script>
</head>
<body>
    <div class="grandfather">
        <div class="father">
            <div class="son"></div>
        </div>
    </div>
</body>
</html>
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