原生JS京东轮播图代码

时间:2020-05-15 Jensen_Yao 人气:0
本文实例为大家分享了JS轮播图的具体代码，供大家参考，具体内容如下
<!DOCTYPE html> 
<html> 
<head lang="en"> 
 <meta charset="UTF-8"> 
 <title></title> 
 <link rel="stylesheet" href="css/reset.css" rel="external nofollow" /> 
 <style> 
 .jiantou { 
  height: 36px; 
  width: 24px; 
  line-height: 36px; 
  text-align: center; 
  background-color: rgba(0, 0, 0, .3); 
  font-size: 14px; 
  color: #fff; 
  position: absolute; 
  top: 0; 
  bottom: 0; 
  margin: auto 0; 
  display: none; 
  z-index: 99999; 
  cursor: pointer; 
 } 
 
 .left { 
  left: 0; 
 } 
 
 .right { 
  right: 0; 
 } 
 
 ul li { 
  height: 20px; 
  width: 20px; 
  background-color: #B7B7B7; 
  float: left; 
  border-radius: 50%; 
  margin: 2px; 
 } 
 
 ul { 
  position: absolute; 
  bottom: 15px; 
  margin: 0 auto; 
  background-color: rgba(255, 255, 255, .3); 
  border-radius: 10px; 
  left: 300px; 
  z-index: 9999; 
  cursor: pointer; 
 } 
 
 .on { 
  background-color: #F40; 
 } 
 
 img { 
  width: 790px; 
  height: 340px; 
  position: absolute; 
  opacity: 0; 
  /*transition: all 2s;*/ 
  /*transition: all 0.5s;*/ /*时间给短一些*/ 
  transition: opacity 0.5s; /*不要写all 那么就不会影响到z-index*/ 
  z-index: 0; 
 } 
 
 .in { 
  width: 790px; 
  height: 340px; 
 } 
 
 #out { 
  width: 790px; 
  height: 340px; 
  margin: 100px auto; 
  position: relative; 
 } 
 
 #out:hover .jiantou { 
  display: block; 
 } 
 </style> 
</head> 
<body> 
<div id="out"> 
 <div class="in"> 
 <img src="img/j1.jpg" alt="" style="opacity: 1;z-index:1"/> 
 <img src="img/j2.jpg" alt=""/> 
 <img src="img/j3.jpg" alt=""/> 
 <img src="img/j4.jpg" alt=""/> 
 <img src="img/j5.jpg" alt=""/> 
 <img src="img/j6.jpg" alt=""/> 
 <img src="img/j7.jpg" alt=""/> 
 <img src="img/j8.jpg" alt=""/> 
 </div> 
 <div class="left jiantou"><</div> 
 <div class="right jiantou">></div> 
 <ul class="clearFix"> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 <li class="on"></li> 
 </ul> 
</div> 
<script> 
 var out = document.getElementById("out"); 
 var img = document.images; 
 var left = document.getElementsByClassName("left").item(0); 
 var right = document.getElementsByClassName("right").item(0); 
 var lilist = document.getElementsByTagName("li"); 
 var index = 0;//标识哪张图片正在出现 
 var timer = null; 
 var timer1 = null; 
 
 right.onclick = function () { 
 //把所有人的opacity置为0 
 /*for (var i = 0; i < img.length; i++) { 
  img[i].style.opacity = 0; 
  }*/ 
 img[index].style.opacity = 0; 
 img[index].style.zIndex = 0; 
 lilist[index].className = ''; 
// index++; 
 index == 7 ? index = 0 : index++; 
 lilist[index].className = 'on'; 
 img[index].style.opacity = 1; 
 img[index].style.zIndex = 1; 
 
 }; 
 
 left.onclick = function () { 
 img[index].style.opacity = 0; 
 lilist[index].className = ''; 
 img[index].style.zIndex = 0; 
// index--; 
 index == 0 ? index = 7 : index--; 
 lilist[index].className = 'on'; 
 img[index].style.opacity = 1; 
 img[index].style.zIndex = 1; 
 }; 
 
 for (var i = 0; i < lilist.length; i++) { 
 lilist[i].value = i; 
 lilist[i].onmouseover = function () { 
  var that = this; 
  timer=setTimeout(function () { 
  img[index].style.opacity = 0; 
  lilist[index].className = ''; 
  img[index].style.zIndex = 0; 
 
  index = that.value; 
 
  lilist[index].className = 'on'; 
  img[index].style.opacity = 1; 
  img[index].style.zIndex = 1; 
  },300) 
 }; 
 lilist[i].onmouseout = function () { 
  clearTimeout(timer); 
 } 
 } 
 out.onclick = function (e) { 
 console.log(e.target); 
 }; 
 timer1 = setInterval(right.onclick,2000); 
 out.onmouseover = function () { 
 clearInterval(timer1); 
 }; 
 out.onmouseout = function () { 
 timer1 = setInterval(right.onclick, 2000); 
 }; 
 var num =5 
 var arr = []; 
 var img =document.images; 
 for(var i=0;i<img.length;i++){ 
 if(i<5){ 
  arr.push(img[i].offsetHeight); 
 }else { 
  img[i].style.position='abl' 
 } 
 } 
 
</script> 
 
 
</body> 
</html>
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