How to achieve Trojan carousel effect in js-JS Tutorial-php.cn

How to achieve Trojan carousel effect in js

王林

Release： 2020-03-30 11:24:21

forward

2450 people have browsed it

How to achieve Trojan carousel effect in js

First of all, let’s take a look at the effect of the Trojan carousel:

How to achieve Trojan carousel effect in js

##The specific code is as follows:

(Recommended tutorial:

js tutorial)

Part of the html code:

<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <title>旋转木马轮播图</title>
 <link rel="stylesheet" href="css/myStyle.css" rel="external nofollow" />
 <script type="text/javascript" src="js/animate.js"></script>
 <script type="text/javascript" src="js/my.js"></script>
</head>
<body>
<div id="wrap">
 <div id="slide">
  <ul>
   <li><a href="#"><img src="images/slidepic1.jpg" alt=""/></a></li>
   <li><a href="#"><img src="images/slidepic2.jpg" alt=""/></a></li>
   <li><a href="#"><img src="images/slidepic3.jpg" alt=""/></a></li>
   <li><a href="#"><img src="images/slidepic4.jpg" alt=""/></a></li>
   <li><a href="#"><img src="images/slidepic5.jpg" alt=""/></a></li>
  </ul>
  <div id="arrow">
   <a href="javascript:;" id="arrLeft"></a>
   <a href="javascript:;" id="arrRight"></a>
  </div>
 </div>
</div>
</body>
</html>

Copy after login

Part of the code of the myStyle.css file introduced in the html part

@charset "UTF-8";
 
blockquote,body,button,dd,dl,dt,fieldset,form,h1,h2,h3,h4, h5, h6, hr, input, legend, li, ol, p, pre, td, textarea, th, ul{
 margin:0;
 padding:0
}
 
body,button,input,select,textarea{
 font:12px/1.5 "Microsoft YaHei", "微软雅黑", SimSun, "宋体", sans-serif;
 color:#666;
}
 
ol,ul{
 list-style:none
}
 
a{
 text-decoration:none
}
 
fieldset,img{
 border:0;
 vertical-align:top;
}
 
a,input,button,select,textarea{
 outline:none
}
 
a,button{
 cursor:pointer
}
 
.wrap{
 width:1200px;
 margin:100px auto;
}
.slide{
 height:500px;
 position: relative;
}
 
.slide li{
 position:absolute;
 left:200px;
 top:0
}
 
.slide li img{
 width:100%
}
 
.arrow{
 opacity:0;
}
 
.prev ,.next{
 width:76px;
 height:112px;
 position:absolute;
 top:50%;
 margin-top:-56px;
 background:url(../images/prev.png) no-repeat;
 z-index:99;
}
 
 
.next{
 right:0;
 background-image:url(../images/next.png);
}

Copy after login

Partial code of the animate.js file introduced in the html part

/**
 * Created by RENPINGSHENG on 2018/4/6.
 */
 
function animate(obj,json,fn) {
 clearInterval(obj.timer);
 obj.timer = setInterval(function () {
  var flag = true;
  for(var k in json){
   if( k == "opacity"){
    var leader = getStyle(obj,k) * 100;
    var target = json[k] * 100;
    var step = (target - leader) /10;
    step = step > 0 ? Math.ceil(step) : Math.floor(step);
    leader = leader + step;
    obj.style[k] = leader /100;
   } else if ( k == "zIndex"){
    obj.style[k] = json[k];
   }else{
    var leader = parseInt(getStyle(obj,k)) || 0;
    var target = json[k];
    var step = (target - leader) /10;
    step = step >0 ? Math.ceil(step) : Math.floor(step);
    leader = leader + step;
    obj.style[k] = leader + "px";
   }
 
   console.log("target:" + target + "leader:" + leader + "step:" + step);
   if (leader != target){
    flag = false;
   }
  }
 
  if (flag){
   clearInterval(obj.timer);
   if(fn){
    fn();
   }
  }
 },15)
}
 
function getStyle(obj,attr){
 if (obj.currentStyle){
  return obj.currentStyle[attr];
 }else{
  return window.getComputedStyle(obj,null)[attr];
 }
}

Copy after login

Partial code of the my.js file introduced in the html part

/**
 * Created by RENPINGSHENG on 2018/4/6.
 */
 
 
window.onload = function () {
 var wrap = document.getElementById("wrap");
 var slide = document.getElementById("slide");
 var ul = slide.children[0];
 var lis = ul.children;
 var arrow = document.getElementById("arrow");
 var arrRight = document.getElementById("arrRight");
 var arrLeft = document.getElementById("arrLeft");
 
 var config = [
  {
   width:400,
   top:20,
   left:50,
   opacity:0.2,
   zIndex:2
  },
  {
   width:600,
   top:70,
   left:0,
   opacity:0.8,
   zIndex:3
  },
  {
   width:800,
   top:100,
   left:200,
   opacity:1,
   zIndex:4
  },
  {
   width:600,
   top:70,
   left:600,
   opacity:0.8,
   zIndex:3
  },
  {
   width:400,
   top:20,
   left:750,
   opacity:0.2,
   zIndex:2
  }
 ];
 
 wrap.onmouseover = function () {
  animate(arrow,{"opacity":1});
 }
 wrap.onmouseout = function () {
  animate(arrow,{"opacity":0});
 }
 function assign() {
  for(var i = 0;i < lis.length;i++){
   animate(lis[i],config[i],function(){
    flag = true;
   })
  }
 }
 
 var flag = true;
 assign();
 arrRight.onclick = function () {
  flag = false;
  config.push(config.shift());
  assign();
 };
 arrLeft.onclick = function () {
  flag = false;
  config.unshift(config.pop());
  assign();
 }
}

Copy after login

The file structure of the entire page is as shown below:

How to achieve Trojan carousel effect in js

More cool CSS3, html5, javascript special effects codes, all in:

js special effects collection

The above is the detailed content of How to achieve Trojan carousel effect in js. For more information, please follow other related articles on the PHP Chinese website!