Dom阻止事件冒泡

最新推荐文章于 2025-01-12 23:46:21 发布

转载最新推荐文章于 2025-01-12 23:46:21 发布 · 991 阅读

本文通过一个HTML页面实例，详细解析了DOM事件冒泡机制，并演示了如何使用e.stopPropagation()和window.event.cancelBubble来阻止事件冒泡。通过三个嵌套的div元素，展示了不同浏览器下（如谷歌、火狐和IE）对事件处理的差异。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        .div1{
            width: 300px;
            height: 300px;
            background: pink;
        }

        .div2{
            width: 200px;
            height: 200px;
            background: blue;
        }

        .div3{
            width: 100px;
            height: 100px;
            background: green;
        }
    </style>
</head>
<body>
    <div class="div1" id="div1">
        <div class="div2" id="div2">
            <div class="div3" id="div3"></div>
        </div>
    </div>

    <script>
        function my$(id){
            return document.getElementById(id)
        }

        var div1Obj = my$('div1')
        div1Obj.onclick = function(event){
            console.log('我是div1')
        }

        var div2Obj = my$('div2')
        div2Obj.onclick = function(e){
            console.log('我是div2')
            if(e && e.stopPropagation){
                console.log('我是支持e 和 e.stopProgation 谷歌和火狐')
                e.stopPropagation()
            }else{
                console.log('我是不支持e 和 e.stopProgation IE')
                window.event.cancelBubble = true
            }
        }

        var div3Obj = my$('div3')
        div3Obj.onclick = function(){
            console.log('我是div3')
        }
    </script>
</body>
</html>