lovecoding
/
vipAllDay


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #box1{
            width: 500px;
            height: 500px;
            background: #00f;
        }
        #box2{
            width: 340px;
            height: 340px;
            background: #0f0;
        }
        #box3{
            width: 200px;
            height: 200px;
            background: #f00;
        }
    </style>
</head>
<body>
    <div id="box1">
        <div id="box2">
            <div id="box3"></div>
        </div>
    </div>
    <script>
        var box1 = document.getElementById("box1");
        var box2 = document.getElementById("box2");
        var box3 = document.getElementById("box3");
        box1.onclick = function() {
            alert("111")
        }
        box2.onclick = function(event) {
            alert("222")
            // 解决事件冒泡
            event.stopPropagation();
            
        }
        box3.onclick = function(event) {
            alert("333")
            // IE解决事件冒泡
            event.cancelBubble = true;
        }
        /***
         * 事件三个阶段 ：
         * 捕获 由外到内
         * 目标
         * 冒泡 由内到外
         */
    </script>
</body>
</html>