代码如下：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
.outer{
width:300px;
height:300px;
background-color:#f50;
}
.inner{
width:150px;
height:150px;
background-color:#0C6;
}
</style>
</head>
<body>
<div id="outer" class="outer">
<div id="inner" class="inner"></div>
</div>
<script>
document.getElementById('outer').addEventListener('click',function(event){
console.log(event.currentTarget);
if(event.target === event.currentTarget){
alert("橘色");
}
});
document.getElementById('inner').addEventListener('click',function(event){
console.log(event.currentTarget);
if(event.target === event.currentTarget){
alert("青色");
}
});
</script>
</body>
</html>
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