为什么再次悬停时下拉菜单动画会降低高度？

时间：2015-09-04 18:04:22

标签： javascript jquery css hover jquery-animate

我最近在MegaDrop中实现了这个HTML，CSS和jQuery代码。与任何下拉菜单一样，当您将鼠标悬停在其上时，它应显示所有链接。

请将鼠标悬停在“商品”上以查看结果。

问题在你徘徊之后开始，当你在动画完成之前再次悬停时，它会切断高度并记住它。在你徘徊几次后，它也不会响应。这很奇怪。

我在容器中没有设置高度。我只是让它本地渲染，因为链接有填充。

容器也有 overlay：hidden 。

要启用jQuery动画，我需要从 .nav＆gt;中删除 display：block 。 li：hover＆gt; div

我的问题是，如何防止这种情况发生？我是否需要向jQuery本身提供更多说明以保持容器的高度而不是缩短它？

这是网站： http://planet.nu/dev/test/index.html

以下是我的HTML，CSS和Javascript：

$(function(){
	$('.animated > li').hover(function(){
		$(this).find('div[class^="container-"]').stop().slideDown('fast');
	},
	function(){
		$(this).find('div[class^="container-"]').stop().slideUp('slow');
	});
});
* { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; padding: 0; margin: 0;}


body { font-family: "PT Sans", sans-serif; background: #f5f5f5; font-size: 100%;}
a { color: #666; text-decoration: none;}

.nav {
	background: #666;
	border-radius: 3px;
	width: 960px;
	margin: 20px auto;
	height: 43px;
}

.nav li { list-style: none;  }
.nav > li { padding: 0; float: left; position: relative; }
.nav > li > a {
	float: left;
	color: #fff;
	font-size: 13px;
	text-decoration: none;
	line-height: 43px;
	padding: 0 20px; 
	border-right: 1px solid #777;
	border-left: 1px solid #555;
	height: 43px;
}
.nav > li:hover > a { background: #555;	border-right: 1px solid #666; }
.nav > li:first-child > a { border-left: 0; }
.nav > li:last-child > a { border-right: 0; }
.nav > li:hover > div {  }

/* MEGA DROP DOWN */

.nav > li > div {
	position: absolute;
	left: 0;
	top: 43px;
	display: none;
	background: #fff;
	padding: 10px 10px;
	box-shadow: 0 2px 3px rgba(0,0,0,0.1);
	overflow: hidden;
}
.nav > li > div p { color: #666; }
.nav > li > div.right { right: 0; left: auto }
.container-1, .container-2, .container-3, .container-4 { font-size: 80%; }


/* COLUMNS */
.col1,.col2,.col3,.col4,.col5 { margin: 10px 0; float: left; padding: 0 10px;}


	/* 1 Column */
	.container-1 { width: 170px; }
	.container-1 .col1 { width: 100%; }

	/* 2 Column */
	.container-2 { width: 270px; }
	.container-2 .col1 { width: 50% }
	.container-2 .col2 { width: 100% }

	/* 3 Column */
	.container-3 { width: 400px; }
	.container-3 .col1 { width: 33.33% }
	.container-3 .col2 { width: 66.66% }
	.container-3 .col3 { width: 100% }


	/* 4 Column */
	.container-4 { width: 500px; }
	.container-4 .col1 { width: 25%; }
	.container-4 .col2 { width: 50% }
	.container-4 .col3 { width: 75% }
	.container-4 .col4 { width: 100% }


	/* 5 Column */
	.container-5 { width: 600px; }
	.container-5 .col1 { width: 20%; }
	.container-5 .col2 { width: 40% }
	.container-5 .col3 { width: 60% }
	.container-5 .col4 { width: 80% }
	.container-5 .col5 { width: 100% }

/* HIGHLIGHTS */

.container-3 .highlighted { 
	width: 400px; 
	margin-left: -20px; 
	padding: 20px; 
	background: #e4fbff; 
	border-top: 1px solid #ddd; 
	border-bottom: 1px solid #ddd;
}
.container-4 .highlighted { 
	width: 500px;
	margin-left: -10px; 
	padding: 20px; 
	background: #e4fbff; 
	border-top: 1px solid #ddd; 
	border-bottom: 1px solid #ddd;
}



.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Mega Drop Down</title>
	<link rel="stylesheet" href="css/megadrop.css" />
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
	<script type="text/javascript" src="js/scripts.js"></script>
</head>
<body>
<ul class="nav clearfix animated">
	<li><a href="#">Home</a></li>
	<li>
		<a href="#">Products</a>
		<div class="container-4">
			<div class="col1">
				<h3>Vegetables</h3>
				<ul>
					<li><a href="#">Tomatoes</a></li>
					<li><a href="#">Squash</a></li>
					<li><a href="#">Zucchini</a></li>
					<li><a href="#">Cucumbers</a></li>
					<li><a href="#">Green Beans</a></li>
					<li><a href="#">Lima Beans</a></li>
				</ul>
			</div>
			<div class="col1">
				<h3>Fruits</h3>
				<ul>
					<li><a href="#">Apples</a></li>
					<li><a href="#">Blueberries</a></li>
					<li><a href="#">Cranberries</a></li>
					<li><a href="#">Raspberries</a></li>
					<li><a href="#">Strawberries</a></li>
				</ul>
			</div>
			<div class="col2">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
			<div class="col4 highlighted">
				<h3>SALE: Buy one get one FREE</h3>
				<p>All of our products are buy one get one free until April 1, 2013.</p>
			</div>
			<div class="col1">
				<h3>Vegetables</h3>
				<ul>
					<li><a href="#">Tomatoes</a></li>
					<li><a href="#">Squash</a></li>
					<li><a href="#">Zucchini</a></li>
					<li><a href="#">Cucumbers</a></li>
					<li><a href="#">Green Beans</a></li>
					<li><a href="#">Lima Beans</a></li>
				</ul>
			</div>
			<div class="col1">
				<h3>Fruits</h3>
				<ul>
					<li><a href="#">Apples</a></li>
					<li><a href="#">Blueberries</a></li>
					<li><a href="#">Cranberries</a></li>
					<li><a href="#">Raspberries</a></li>
					<li><a href="#">Strawberries</a></li>
				</ul>
			</div>
			<div class="col2">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
			<div class="col4 highlighted">
				<h3>SALE: Buy one get one FREE</h3>
				<p>All of our products are buy one get one free until April 1, 2013.</p>
			</div>
			<div class="col4">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
		</div>	
	</li>
	<li><a href="#">Blog</a></li>
	<li><a href="#">Donate</a></li>
	<li>
		<a href="#">About</a>
		<div class="container-1 right">
			<ul>
				<li><a href="#">Who We Are</a></li>
				<li><a href="#">Why We Care</a></li>
				<li><a href="#">Some other page</a></li>
				<li><a href="#">How We Work</a></li>
			</ul>
		</div>
	</li>
	<li><a href="#">Locations</a></li>
	<li><a href="#">Contact Us</a></li>
</ul>
</body>
</html>

2 个答案:

答案 0 :(得分：0)

我不太了解JavaScript来解释错综复杂的细节，但你必须将参数传递给stop（）方法才能完成上一个动画。

$(function(){
    $('.animated > li').hover(function(){
        $(this).find('div[class^="container-"]').stop(null, true).slideDown('fast');
    },
    function(){
        $(this).find('div[class^="container-"]').stop().slideUp('slow');
    });
});

答案 1 :(得分：0)

啊！看来animate在div中断时会留下一些残值（使用firebug进行的检查清楚地显示了这一点）。在开始动画之前清理它应该修复它。

$(this).find('div[class^="container-"]').attr("style","").stop().slideDown('fast'); 

$(function(){
	$('.animated > li').hover(function(){
		$(this).find('div[class^="container-"]').attr("style","").stop().slideDown('fast');
	},
	function(){
		$(this).find('div[class^="container-"]').stop().slideUp('slow');
	});
});
* { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; padding: 0; margin: 0;}


body { font-family: "PT Sans", sans-serif; background: #f5f5f5; font-size: 100%;}
a { color: #666; text-decoration: none;}

.nav {
	background: #666;
	border-radius: 3px;
	width: 960px;
	margin: 20px auto;
	height: 43px;
}

.nav li { list-style: none;  }
.nav > li { padding: 0; float: left; position: relative; }
.nav > li > a {
	float: left;
	color: #fff;
	font-size: 13px;
	text-decoration: none;
	line-height: 43px;
	padding: 0 20px; 
	border-right: 1px solid #777;
	border-left: 1px solid #555;
	height: 43px;
}
.nav > li:hover > a { background: #555;	border-right: 1px solid #666; }
.nav > li:first-child > a { border-left: 0; }
.nav > li:last-child > a { border-right: 0; }
.nav > li:hover > div {  }

/* MEGA DROP DOWN */

.nav > li > div {
	position: absolute;
	left: 0;
	top: 43px;
	display: none;
	background: #fff;
	padding: 10px 10px;
	box-shadow: 0 2px 3px rgba(0,0,0,0.1);
	overflow: hidden;
}
.nav > li > div p { color: #666; }
.nav > li > div.right { right: 0; left: auto }
.container-1, .container-2, .container-3, .container-4 { font-size: 80%; }


/* COLUMNS */
.col1,.col2,.col3,.col4,.col5 { margin: 10px 0; float: left; padding: 0 10px;}


	/* 1 Column */
	.container-1 { width: 170px; }
	.container-1 .col1 { width: 100%; }

	/* 2 Column */
	.container-2 { width: 270px; }
	.container-2 .col1 { width: 50% }
	.container-2 .col2 { width: 100% }

	/* 3 Column */
	.container-3 { width: 400px; }
	.container-3 .col1 { width: 33.33% }
	.container-3 .col2 { width: 66.66% }
	.container-3 .col3 { width: 100% }


	/* 4 Column */
	.container-4 { width: 500px; }
	.container-4 .col1 { width: 25%; }
	.container-4 .col2 { width: 50% }
	.container-4 .col3 { width: 75% }
	.container-4 .col4 { width: 100% }


	/* 5 Column */
	.container-5 { width: 600px; }
	.container-5 .col1 { width: 20%; }
	.container-5 .col2 { width: 40% }
	.container-5 .col3 { width: 60% }
	.container-5 .col4 { width: 80% }
	.container-5 .col5 { width: 100% }

/* HIGHLIGHTS */

.container-3 .highlighted { 
	width: 400px; 
	margin-left: -20px; 
	padding: 20px; 
	background: #e4fbff; 
	border-top: 1px solid #ddd; 
	border-bottom: 1px solid #ddd;
}
.container-4 .highlighted { 
	width: 500px;
	margin-left: -10px; 
	padding: 20px; 
	background: #e4fbff; 
	border-top: 1px solid #ddd; 
	border-bottom: 1px solid #ddd;
}



.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Mega Drop Down</title>
	<link rel="stylesheet" href="css/megadrop.css" />
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
	<script type="text/javascript" src="js/scripts.js"></script>
</head>
<body>
<ul class="nav clearfix animated">
	<li><a href="#">Home</a></li>
	<li>
		<a href="#">Products</a>
		<div class="container-4">
			<div class="col1">
				<h3>Vegetables</h3>
				<ul>
					<li><a href="#">Tomatoes</a></li>
					<li><a href="#">Squash</a></li>
					<li><a href="#">Zucchini</a></li>
					<li><a href="#">Cucumbers</a></li>
					<li><a href="#">Green Beans</a></li>
					<li><a href="#">Lima Beans</a></li>
				</ul>
			</div>
			<div class="col1">
				<h3>Fruits</h3>
				<ul>
					<li><a href="#">Apples</a></li>
					<li><a href="#">Blueberries</a></li>
					<li><a href="#">Cranberries</a></li>
					<li><a href="#">Raspberries</a></li>
					<li><a href="#">Strawberries</a></li>
				</ul>
			</div>
			<div class="col2">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
			<div class="col4 highlighted">
				<h3>SALE: Buy one get one FREE</h3>
				<p>All of our products are buy one get one free until April 1, 2013.</p>
			</div>
			<div class="col1">
				<h3>Vegetables</h3>
				<ul>
					<li><a href="#">Tomatoes</a></li>
					<li><a href="#">Squash</a></li>
					<li><a href="#">Zucchini</a></li>
					<li><a href="#">Cucumbers</a></li>
					<li><a href="#">Green Beans</a></li>
					<li><a href="#">Lima Beans</a></li>
				</ul>
			</div>
			<div class="col1">
				<h3>Fruits</h3>
				<ul>
					<li><a href="#">Apples</a></li>
					<li><a href="#">Blueberries</a></li>
					<li><a href="#">Cranberries</a></li>
					<li><a href="#">Raspberries</a></li>
					<li><a href="#">Strawberries</a></li>
				</ul>
			</div>
			<div class="col2">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
			<div class="col4 highlighted">
				<h3>SALE: Buy one get one FREE</h3>
				<p>All of our products are buy one get one free until April 1, 2013.</p>
			</div>
			<div class="col4">
				<h3>Quality Guaranteed</h3>
				<p>We stand behind our products and guarantee you will get high quality products.</p>
			</div>
		</div>	
	</li>
	<li><a href="#">Blog</a></li>
	<li><a href="#">Donate</a></li>
	<li>
		<a href="#">About</a>
		<div class="container-1 right">
			<ul>
				<li><a href="#">Who We Are</a></li>
				<li><a href="#">Why We Care</a></li>
				<li><a href="#">Some other page</a></li>
				<li><a href="#">How We Work</a></li>
			</ul>
		</div>
	</li>
	<li><a href="#">Locations</a></li>
	<li><a href="#">Contact Us</a></li>
</ul>
</body>
</html>

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