//不规则的点击都会触发mouseleave事件
$('.clickhere').mouseleave(function(){
alert('mouseleave');
})
<html>
<body>
<div class='box'>
<div class='clickhere'>点我</div>
</div>
</body>
</html>
.box{
background-color:#fff;
height:300px
}
.clickhere{
background-color:red;
width:100px;
height:100px
}