jQuery plug-in to achieve seamless upward text scrolling effect code

jQuery plug-in to achieve seamless upward text scrolling effect code_jquery

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Release： 2016-05-16 15:13:26

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The example in this article describes the code of the jQuery plug-in to achieve the seamless upward scrolling effect of text. Share it with everyone for your reference, the details are as follows:

This plug-in is designed to implement the currently popular seamless upward scrolling effect. When the mouse moves over the text, the upward scrolling will stop, and when the mouse leaves, the upward scrolling will continue. The overall code is as follows:

<!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>无缝向上滚动</title>
<style>
*{margin:0;padding:0;font-size:12px;}
li{list-style:none;}
.box{margin:20px;width:320px;height:195px;border:1px solid #ddd;padding:10px;overflow:hidden;}
.box ul li{line-height:25px;}
</style>
<script type="text/javascript" src="jquery-1.7.1.js"></script>
</head>
<body>
<div class="box">
 <ul>
 <li>01这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>02这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 <li>这是一个无缝向上滚动的特效，是我第一次写这样的插件</li>
 </ul>
</div>
<script>
/*
* scrollTop 0.1
* Dependence jquery-1.7.1.js
*/
;(function($){
 $.fn.scrollTop = function(options){
  var defaults = {
   speed:30
   }
  var opts = $.extend(defaults,options);
  this.each(function(){
   var $timer;
   var scroll_top=0;
   var obj = $(this);
   var $height = obj.find("ul").height();
   obj.find("ul").clone().appendTo(obj);
   obj.hover(function(){
    clearInterval($timer);
    },function(){
     $timer = setInterval(function(){
      scroll_top++;
      if(scroll_top > $height){
       scroll_top = 0;
      }
      obj.find("ul").first().css("margin-top",-scroll_top);
    },opts.speed);
    }).trigger("mouseleave");
   })
  }
 })(jQuery)
</script>
<script>
$(function(){
 $(".box").scrollTop({
  speed:30 //数值越大 速度越慢
  });
})
</script>
</body>
</html>

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