jQuery中的事件: on()注册,off()删除，toggle()切换
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jQuery中的事件注册与删除： on()和off()方法的使用</title>
</head>
<style type="text/css">
.box{
width: 300px;
height: 300px;
margin: 0 auto;
border: 1px solid green;
}
.box div{
width: 300px;
height: 240px;
text-align: center;
}
button{
background: #00b33b;
border: 0;
color: #fff;
width: 120px;
height: 30px;
text-align: center;
margin: 10px 13px;
}
button:hover{
opacity: 0.9;
}
.active{
color: #fff;
}
</style>
<body>
<div class="box">
<div>
<p>toggleClass方法添加class</p>
<h6 style="display: none;">toggle()方法：隐藏就显示，显示就隐藏</h6>
</div>
<button id="btn1">toggle/toggleClass</button>
<button id="btn2">off()删除划出事件</button>
</div>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script>
//on()绑定事件
/*$('.box div').on('mouseenter',function(){
$(this).css('background','lightgray')
}).on('mouseleave',function(){
$(this).css('background','lightcoral')
})*/
//hover等价于mouseenter，mouseleave
$('.box div').hover(function(){
$(this).css('background','lightgray')
},function(){
$(this).css('background','lightcoral')
})
//toggle() toggleClass()
$('#btn1').click(function(){
$('.box div p').toggleClass('active');
$('.box div h6').toggle()
})
//off() 删除事件
$('#btn2').click(function(){
$('.box div').off('mouseleave')
})
</script>
</body>
</html>