Home  >  Article  >  Web Front-end  >  js to achieve seamless scrolling of images_javascript skills

js to achieve seamless scrolling of images_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:23:591403browse

The js seamless scrolling effect can be seen on almost any web page. Some may use plug-ins. In fact, it is relatively simple to use original javascript.

The main thing is to use js position knowledge.

  • 1.innerHTML: Set or get the html tag of the element
  • 2.scrollLeft: Set or get the distance between the left edge of the object and the leftmost end of the currently visible content in the window
  • 3.offsetWidth: Set or get the width of the specified label
  • 4.setInterval(): Set the method to start regularly
  • 5.clearInterval(); clear timer

Rendering:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>javascript scroll制作</title>
</head>
<body>
<style>
  /*conment*/
  *{
  margin: 0;
  padding: 0;
 }
 img{max-width: 100%;}
 .container{
  max-width: 620px;
  margin: 0 auto;
  padding-top: 50px;
 }
 .text-center{text-align: center;}
 .list-inline li{
  display: inline-block;
 }
 .hide{display: none;}
 hr{
  margin:20px 0; 
 }
 .tag{
  background-color: #ccc;
  padding: 5px 0;
 }
 .tag li{
  padding: 0 10px;
  border-left: 1px solid #fff;
  cursor:pointer;
 }
 .tag li:first-child{
  border-left: transparent;
 }
 .tag li.active{
  background-color: #ddd;
 }
 .scroll{
  position: relative;
  padding: 10px;
  margin-bottom: 20px;
  background-color: #ddd;
 }
 .wrap{
  overflow: hidden; 
 }
 .content{
  min-width: 3000px;
  height: 200px;
 }
 .content ul{
  float: left;
 }
 .content ul li{
  display: inline-block;
  max-width: 200px;
 }
 #prev,#next{
  width: 50px;
  height: 50px; 
  margin-top: -25px; 
  background-color: #ccc; 
  line-height: 50px; 
  text-align: center;
  cursor: pointer; 
 }
 #prev{
  position: absolute;
  left: 0;
  top:50%;
  border-radius: 0 25px 25px 0;
 }
 #next{
  position: absolute;
  right: 0;
  top:50%; 
  border-radius: 25px 0 0 25px;
 }
</style>
  <div class="container">
    <h1 class="text-center">图片滚动制作</h1>
    <hr>
  <div class="scroll">
   <div class="wrap" id="wrap">
    <div id="content" class="content" >
     <ul id="list1">
      <li> <img src="freelance.gif" alt=""> </li>
      <li> <img src="button.gif" alt=""></li>
      <li> <img src="load.gif" alt=""></li>
      <li> <img src="straw.gif" alt=""></li>   
     </ul>
     <ul id="list2">
     </ul>
    </div>
   </div>

   <div id="prev">
    prev
   </div> 
   <div id="next">
    next
   </div>   
  </div> 
  </div>
<script>
 var wrap=document.getElementById('wrap');
 var list1=document.getElementById('list1');
 var list2=document.getElementById('list2');
 var prev=document.getElementById('prev');
 var next=document.getElementById('next');
 //创建复制一份内容列表
 list2.innerHTML=list1.innerHTML;
 //向左循环滚动
 function scroll(){
  if(wrap.scrollLeft>=list2.offsetWidth){
   wrap.scrollLeft=0;
  }
  else{
   wrap.scrollLeft++;
  }
 }
  timer = setInterval(scroll,1);
 //鼠标停留使用clearInterval()
 wrap.onmouseover=function(){
  clearInterval(timer);
 }
 wrap.onmouseout=function(){
  timer = setInterval(scroll,1);
 }
 //向左加速
 function scroll_l(){
  if(wrap.scrollLeft>=list2.offsetWidth){
   wrap.scrollLeft=0;
  }
  else{
   wrap.scrollLeft++;
  }
 }
 //向右滚动
 function scroll_r(){
  if(wrap.scrollLeft<=0){
   wrap.scrollLeft+=list2.offsetWidth;
  }
  else{
   wrap.scrollLeft--;
  }
 }  
 prev.onclick=function(){
  clearInterval(timer);
  change(0)
 }
 next.onclick=function(){
  clearInterval(timer);
  change(1)
 }
 function change(r){
  if(r==0){
   timer = setInterval(scroll_l,60);
   wrap.onmouseout = function(){
    timer = setInterval(scroll_l,60);
   }
  }
  if(r==1){
   timer = setInterval(scroll_r,60);
   wrap.onmouseout = function(){
    timer = setInterval(scroll_r,60);
   }
  } 
 } 
</script> 
</body>
</html>

The above is the js code to achieve seamless scrolling of images shared with you. I hope it will be helpful to everyone in learning javascript programming.

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