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Detailed explanation of how to implement list scrolling in JS

怪我咯
怪我咯Original
2017-07-04 15:12:312149browse

This article mainly introduces the method of realizing list scrolling in javascript. It analyzes in detail the page layout of javascript to realize list scrolling and the implementation techniques of javascript scrolling effect. It has certain reference value. Friends in need can refer to it

The example in this article describes the method of implementing list scrolling in javascript. Share it with everyone for your reference. The details are as follows:

index.html is as follows: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="keywords" content="" />
 <meta name="description" content="" />
 <link rel="stylesheet" type="text/css" href="css/global.css" />
 <script type="text/javascript" src="js/jquery-1.7.min.js"></script>
 <script type="text/javascript" src="js/scroll_img.js"></script>
 <title>图片列表滚动</title>
</head>
<body>
<p class="scroll_img_wrap clearfix">
 <p class="left_btn"><a href="javascript:void(0)"><img src="images/btn.jpg" /></a></p>
 <p id="scroll_img">
  <ul class="scroll_img_list clearfix">
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information1</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information2</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information3</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information4</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
    <p><a href="#">information5</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
    <p><a href="#">information6</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
    <p><a href="#">information7</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
    <p><a href="#">information8</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information9</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information10</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information11</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information12</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information13</a></p>
   </li>
   <li>
    <p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
    <p><a href="#">information14</a></p>
   </li>
  </ul>
 </p>
 <p class="right_btn"><a href="javascript:void(0)"><img src="images/btn.jpg" /></a></p>
</p>
</body>
<script type="text/javascript">
(function(){
 var test=new scroll_img(&#39;scroll_img&#39;,150,590,140,10);
 test.initialize();
 $(&#39;.left_btn&#39;).click(function(){
  test.stop();
  test.left();
  test.autoplay();
 });
 $(&#39;.right_btn&#39;).click(function(){
  test.stop();
  test.right();
  test.autoplay();
 });
})();
</script>
</html>

scroll_img.js is as follows: 

function scroll_img(target,distance,show_width,li_width,mr){
 this.distance=distance;  //每次移动距离
 this.target=$("#"+target);
 this.show_width=show_width; //显示区域宽度
 this.li_width=li_width;  //items宽度
 this.mr=mr;     //items间距
 this.scrollbar=$("#"+target).find(&#39;ul&#39;);
 this.position=0;
 this.direction=1;
}
scroll_img.prototype={
 version:1.00,
 author:"yangfeifei",
 date:2011-11-21,
 initialize:function(){
  var t=this;
  t.scrollbar.css(&#39;position&#39;,&#39;relative&#39;);
  //初始动作
  t.autoplay();
  t.scrollbar.mouseover(function(){t.stop();});  //鼠标移到图片上停止自动播放
  t.scrollbar.mouseout(function(){t.autoplay();}); //鼠标移出图片开始自动播放
 },
 right:function(){
  var t=this;
  (-t.position)<t.total_length()?t.position-=t.distance:t.position=t.position;
  if((-t.position)<t.total_length()){
   t.scrollbar.animate({left:t.position},500);
   t.direction=1;
  }
  if((-t.position)==t.total_length()){
   t.scrollbar.animate({left:t.position},500);
   t.direction=-1;
  }
 },
 left:function(){
  var t=this;
  (-t.position)>0?t.position+=t.distance:t.position=t.position;
  if((-t.position)>0){
   t.scrollbar.animate({left:t.position},500);
   t.direction=-1;
  }
  if((-t.position)==0){
   t.scrollbar.animate({left:t.position},500);
   t.direction=1;
  }
 },
 total_length:function(){
  var t=this,
  total_num=t.scrollbar.find(&#39;li&#39;).length;
  return total_num*(t.li_width+t.mr)-(t.mr+t.show_width);
 },
 autoplay:function(){
  var t=this;
  t.setInt=setInterval(function(){
   t.direction==1?t.right():t.left();
  },3000);
 },
 stop:function(){
  var t=this;
  clearInterval(t.setInt);
 }
}

global.css is as follows: 

/*CSS reset*/
body,p,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td{margin:0;padding:0;font-family:arial,"宋体";}
table{border-collapse:collapse;border-spacing:0;}
fieldset,img{border:0;}
address,caption,cite,code,dfn,em,strong,th,var{font-style:normal;font-weight:bold;}
ol,ul{list-style-type:none;}
caption,th{text-align:left;}
h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal;}/*font-size:100%;的作用主要是改变它默认的大小，继承父体的字体大小*/
q:before,q:after{content:&#39; &#39;;}
abbr,acronym{border:0;}
.cb{clear:both;}
.cl{clear:left;}
.cr{clear:right;}
.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;}
.clearfix{display:inline-block;}
* html .clearfix{height:1%;}
.clearfix{display:block;}
/*主体css*/
.scroll_img_wrap{width:612px;margin: 10px auto;}
 #scroll_img{width:590px;overflow:hidden;float:left;*position:relative;border: 1px #ccc solid;}/*可视区域宽度*/
  .scroll_img_list{width:9999px;}
   .scroll_img_list li{float:left;width:140px;margin-right:10px;}/*items*/
   .scroll_img_list li p{text-align:center;}
   .scroll_img_list li p a{text-decoration:none;color:#666;}
 .left_btn,.right_btn{float:left;}

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