<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>事件委托</title>
<!--
事件委托:利用事件冒泡的特性,将子节点事件委托给父节点
target;获取触发事件的元素
-->
</head>
<body>
<ul id="ul">
<li id="one">按钮一</li>
<li id="two">按钮二</li>
<li id="thr">按钮三</li>
</ul>
<script>
var ul=document.getElementById("ul");
ul.addEventListener("click",function (event){
if (event.target.id=="one"){
alert("1");
}else if(event.target.id=="two"){
alert("2");
}else if(event.target.id=="thr"){
alert("3");
}
})
</script>
</body>
</html>