Home >Web Front-end >JS Tutorial >Use jquery to create scrolling to a specified position to trigger animation_jquery

Use jquery to create scrolling to a specified position to trigger animation_jquery

WBOY
WBOYOriginal
2016-05-16 15:08:001839browse

It is completed using the animation feature of CSS3. The compatibility with IE is not very good, so it is suitable for mobile phones.

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>sas</title>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js"></script>
<style type="text/css">
*{ margin:0px; padding:0px;}
.gs{
position:relative;
top:800px; 
background-color:#099; 
left:150px; width:80px; 
}
.xz{

animation:roate 2s;
animation-fill-mode:forwards;
animation-direction:alternate;
	}

@keyframes roate{
	from { transform:rotate(0deg);
	width:100px;
  height:100px; }
	to{transform:rotate(360deg);
	width:200px;
  height:200px;
	}}
.xs{ width:50px; float: left; height:30px; background-color: #F90; position:fixed; left:700px; top:0px;}

</style>
</head>

<body>
<script type="text/javascript">
function gdjz(div,cssname,offset){
	var a,b,c,d;
	d=$(div).offset().top;
	a=eval(d + offset);
	b=$(window).scrollTop(); 
	c=$(window).height();
	if(b+c>a){
		$((div)).addClass((cssname));
		}
	}
	
$(document).ready(function(e) {
$(window).scroll(function(){
	gdjz("#dh",'xz',500);
	}
	
/*var a,b,c;
a=$("#dh").offset().top;//元素相对于窗口的距离
b=$(window).scrollTop(); //监控窗口已滚动的距离;
c=$(document).height();//整个文档的高度
d=$(window).height();//浏览器窗口的高度*/
	
/*if(d+b>a+100){
	$("#dh").addClass("xz");
	}
*/
	);
});
</script>
<div style="height:1800px; background-color:#999; width:500px; float:left;">
<div id="dh" class="gs" >触发动画</div>
</div>
<div class="xs"></div>
</body>
</html>

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn