基于jQuery的公告无限循环滚动实现代码

时间：2021-05-25

在线演示：http://demo.jb51.net/js/2012/callboard/
jQuery代码
复制代码 代码如下:
//第二版：Newton改造
(function (win){
var callboarTimer;
var callboard = $('#callboard');
var callboardUl = callboard.find('ul');
var callboardLi = callboard.find('li');
var liLen = callboard.find('li').length;
var initHeight = callboardLi.first().outerHeight(true);
win.autoAnimation = function (){
if (liLen <= 1) return;
var self = arguments.callee;
var callboardLiFirst = callboard.find('li').first();
callboardLiFirst.animate({
marginTop:-initHeight
}, 500, function (){
clearTimeout(callboarTimer);
callboardLiFirst.appendTo(callboardUl).css({marginTop:0});
callboarTimer = setTimeout(self, 5000);
});
}
callboard.mouseenter(
function (){
clearTimeout(callboarTimer);
}).mouseleave(function (){
callboarTimer = setTimeout(win.autoAnimation, 5000);
});
}(window));
setTimeout(window.autoAnimation, 5000);

HTML代码：
复制代码 代码如下:
<div id="callboard">
<ul>
<li>
<a href="http:///2012042036.html">公告：前端组主题正在整理中..有需要用的朋友请留个言，以方便及时通知！</a>
</li>
<li>
<span style="color:red;">公告：前端组上线一个月零八天，PR升为3，BD权重1</span>
</li>
</ul>

CSS代码：(可根据需求另设)
复制代码 代码如下:
#callboard { height:24px; line-height:24px; overflow:hidden;}
#callboard ul { padding:0;}
#callboard li { padding:0;}

完整演示代码：
复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>滚动公告栏</title>
<style type="text/css">
header, nav, aside, menu, figure, article, footer { display:block; }
body, div, form, textarea, label, input, ul, ol, li, dl, dt, dd, p, span, a, img, h1, h2, h3, h4, h5, h6, tbody, tfoot, tr, th, td, pre, code, form, fieldset, legend, font { margin:0; padding:0; }
table { border-collapse:collapse; border-spacing:0; }
caption, th { text-align:left; }
sup { vertical-align:text-top; }
sub { vertical-align:text-bottom; }
li { list-style:none; }
fieldset, img { border:none; }
input, textarea, select { font-family:inherit; font-size:inherit; font-weight:inherit; *font-size:100%;
color:inherit; _color:#333; *color:#333;
outline:none; }

.cfix { *display:inline-block;*zoom:1}
.cfix:after { content:"."; display:block; height:0; clear:both; visibility:hidden; }

#callboard { width:600px; margin:100px auto 0; height:24px; line-height:24px; overflow:hidden; font-size:12px; background-color:#f5f5f5;}
#callboard ul { padding:0; }
#callboard li { padding:0; }
</style>
<script type="text/javascript" src="http://demo.jb51.net/jslib/jquery/jquery-1.7.2.min.js"></script>
</head>
<body>
<div id="callboard">
<ul>
<li>
<span style="color:red;">公告[2]：前端组上线一个月零八天，PR升为3，BD权重1</span>
</li>
<li>
<span style="color:red;">公告[3]：撤下了BloggerAds，原因为收入太少，打开速度慢！</span>
</li>
<li style="margin-top: 0px;">
<a href="https://www.jb51.net">公告[1]：前端组主题正在整理中..有需要用的朋友请留个言，以方便及时通知！</a>
</li>
</ul>
</div>
<!--公告板滚动-->
<script type="text/javascript">
(function (win){
var callboarTimer;
var callboard = $('#callboard');
var callboardUl = callboard.find('ul');
var callboardLi = callboard.find('li');
var liLen = callboard.find('li').length;
var initHeight = callboardLi.first().outerHeight(true);
win.autoAnimation = function (){
if (liLen <= 1) return;
var self = arguments.callee;
var callboardLiFirst = callboard.find('li').first();
callboardLiFirst.animate({
marginTop:-initHeight
}, 500, function (){
clearTimeout(callboarTimer);
callboardLiFirst.appendTo(callboardUl).css({marginTop:0});
callboarTimer = setTimeout(self, 5000);
});
}
callboard.mouseenter(
function (){
clearTimeout(callboarTimer);
}).mouseleave(function (){
callboarTimer = setTimeout(win.autoAnimation, 5000);
});
}(window));
setTimeout(window.autoAnimation, 5000);
</script>
</body>
</html>

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