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Pure JS to implement carousel chart

高洛峰Original: 2017-02-23 17:33:051758browse

I have been watching js animations these days, and today I got another carousel image, which is implemented using pure js, but it is not beautified. If you need it, you can beautify it yourself

The following code ：

<!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>图片轮播的效果</title>
  <style type="text/css">
    * {
      margin: 0;
      padding: 0;
      text-decoration: none;
    }
    body {
      padding: 20px;
    }
    #container {
      position: relative;
      width: 600px;
      height: 400px;
      border: 3px solid #333;
      overflow: hidden;
    }
    #list {
      position: absolute;
      z-index: 1;
      width: 4200px;
      height: 400px;
    }
    #list img {
      float: left;
      width: 600px;
      height: 400px;
    }
    #buttons {
      position: absolute;
      left: 250px;
      bottom: 20px;
      z-index: 2;
      height: 10px;
      width: 100px;
    }
    #buttons span {
      float: left;
      margin-right: 5px;
      width: 10px;
      height: 10px;
      border: 1px solid #fff;
      border-radius: 50%;
      background: #333;
      cursor: pointer;
    }
    #buttons .on {
      background: orangered;
    }
    .arrow {
      position: absolute;
      top: 180px;
      z-index: 2;
      display: none;
      width: 40px;
      height: 40px;
      font-size: 36px;
      font-weight: bold;
      line-height: 39px;
      text-align: center;
      color: #fff;
      background-color: RGBA(0, 0, 0, .3);
      cursor: pointer;
    }
    .arrow:hover {
      background-color: RGBA(0, 0, 0, .7);
    }
    #container:hover .arrow {
      display: block;
    }
    #prev {
      left: 20px;
    }
    #next {
      right: 20px;
    }
  </style>
</head>
<body>
<p id="container">
  <p id="list" style="left: -600px;">
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s018.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s018.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s019.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s020.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s021.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s022.jpg" alt="无缝滚动" />
    <img src="http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s022.jpg" alt="无缝滚动" />
  </p>
  <p id="buttons">
    <span index="1" class="on"></span>
    <span index="2"></span>
    <span index="3"></span>
    <span index="4"></span>
    <span index="5"></span>
  </p>
  <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="prev" class="arrow"><</a>
  <a href="javascript:;" rel="external nofollow" rel="external nofollow" id="next" class="arrow">></a>
</p>
<script type="text/javascript">
  window.onload=function(){
    var container = document.getElementById("container");
    var list = document.getElementById("list");
    var buttons = document.getElementById("buttons").getElementsByTagName(&#39;span&#39;);
    var prev = document.getElementById("prev");
    var next = document.getElementById("next");
    var index = 1;
   function animate(offset){
     var newLeft = parseInt(list.style.left) + offset;
     list.style.left = newLeft + &#39;px&#39;;
     if(newLeft<-3000){
       list.style.left= -600 +&#39;px&#39;;
     }
     if(newLeft>-600){
       list.style.left = -3000 + &#39;px&#39;;
     }
   }
   function buttonsshow(){
     for(var i =0; i<buttons.length;i++){
       if(buttons[i].className == &#39;on&#39;){
         buttons[i].className=&#39;&#39;;
       }
     }
     buttons[index-1].className=&#39;on&#39;;
   }
   prev.onclick = function(){
     index-=1;
     if(index<1)
     {
       index=5;
     }
     buttonsshow();
     animate(600);
   };
   next.onclick = function(){
     index+=1;
     if(index>5){
       index=1;
     }
     buttonsshow();
     animate(-600);
   };
   //自动播放
   var timer;
    function play(){
      timer= setInterval(function(){
        next.onclick();
      },1000)
    }
    play();
    function stop(){
      clearInterval(timer);
    }
    container.onmouseover=stop;
    container.onmouseout=play;
for(var i=0; i<buttons.length; i++){
  ( function(i){
      buttons[i].onclick=function(){
        var clickindex= parseInt(this.getAttribute(&#39;index&#39;));
        var offset = 600*(index-clickindex);
        animate(offset);
        index = clickindex;
        buttonsshow();
      }
  })(i);
}
  }
</script>
</body>
</html>

The above is the pure JS implementation of the carousel chart introduced by the editor. I hope it will be helpful to you. If you have any questions, please Leave me a message and I will reply to you in time. I would also like to thank you all for your support of the PHP Chinese website!

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