我的理解在下面的代码中显示，currentTarget比target来的更具体些，点那个就是哪个
<!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>target与currentTarget区别</title>
<style>
#box{
width: 500px;
height: 200px;
background-color: blue;
}
</style>
</head>
<body>
<div onclick="getClick(event)" id="box">
<h1 onclick="getClick(event)" id="boxh">我是h1标签</h1>
</div>
<script>
var box = document.querySelector(‘#box‘);
var boxh = document.querySelector(‘#boxh‘);
function getClick(event){
a = event.currentTarget;
b = event.target;
alert("currentTarget 指向： " + a.id + "， target指向：" + b.id)
}
</script>
</body>
</html>
原文：http://www.cnblogs.com/lzq035/p/7966769.html