lovecoding
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VIP32


			
				
					
						
						
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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: 300px;
            height: 300px;
            background: #f00;
            margin-top: 30px;
        }
        #box2 {
            width: 150px;
            height: 150px;
            background: #ff0;
        }
        #box3 {
            width: 300px;
            height: 300px;
            background: #00f;
            margin-top: 30px;
        }
        #box4 {
            width: 150px;
            height: 150px;
            background: #0f0;
        }
    </style>
</head>
<body>
    <!-- 
        万维网联盟(W3C)
        DOM事件流：三个阶段
            事件捕获
            目标阶段
            事件冒泡
    -->
    <div id="box1">
        <div id="box2"></div>
    </div>
    <div id="box3">
        <div id="box4"></div>
    </div>
    <script>
        var box1 = document.getElementById("box1");
        var box2 = document.getElementById("box2");
        var box3 = document.getElementById("box3");
        var box4 = document.getElementById("box4");

        box1.addEventListener("click",function(){
            console.log(this,'box1')
        },true)
        box2.addEventListener("click",function(){
            console.log(this,'box2')
        },true)
        box3.addEventListener("click",function(){
            console.log(this,'box3')
        },false)
        box4.addEventListener("click",function(){
            console.log(this,'box4')
        },false)
        // removeEventListener('监听的时间方法',执行的函数,触发的事件类型：true (事件捕获) / false（事件冒泡）)
    </script>
</body>
</html>