Home >Web Front-end >JS Tutorial >JavaScript implements seamless scrolling effect of carousel images

JavaScript implements seamless scrolling effect of carousel images

陈政宽～Original: 2017-06-28 11:40:082300browse

This article mainly introduces the seamless scrolling effect of js carousel chart in detail, which has a certain reference value. Interested friends can refer to it

How to start and end the carousel chart when making it If they cannot be connected, the effect will be a bit ugly. Here is a method I commonly use:

Let me explain in words first:

If you want to display 5 pictures, they are 1, 2, and 3. ,4,5 So the introduction of the code is like this: 1,2,3,4,5,1

I won’t go into detail here about the sequential rotation. The main point is 5>1 and 1>5 carousel

i represents the index of the current picture

pre represents the button of the previous picture

next represents the button of the next picture

ul represents the picture list

(1) 5>1>2... When the "next" button goes from 5 to 1, it rotates normally in order, and when the current picture is the second "1" , the next picture should be "2", then when "next", the left value of ul is 0, i==1;

(2) 1>5>4.... When When the "pre" button rotates from the current picture "1" (the first 1) to picture 5, i==4, the left value of ul becomes -5 times the width of img, that is, the first 1 is quietly Becomes the last 1;

It’s a bit confusing to express it in language, so let’s put the code below:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Document</title>
 <style type="text/css">
 *{padding: 0;margin: 0;}
 .container{
  width: 273px;height: 163px;overflow: hidden;
  position: relative;margin: 0 auto;
 }
 .list{
  position: absolute;width: 1638px;top: 0;left: 0px;
 }
 .list li{
  float: left;list-style: none;
 }
 .btn{
  position: absolute;display: block;width: 40px;height: 50px;font-size: 40px;
  text-align: center;font-weight: bold;top: 50%;margin-top: -25px;background-color: rgba(255,255,255,0.5);cursor:pointer;
 }
 .btn:hover{
  background-color: rgba(0,0,0,0.3);color: #fff;
 }
 .pre{
  left: 0;
 }
 .next{
  right: 0;
 }
 .nav{
  position: absolute;bottom: 5px;display: flex;justify-content: center;width: 100%;
 }
 .nav span{
  width: 10px;height: 10px;border-radius: 10px;background-color: #fff;z-index: 2;display: inline-block;margin-right: 10px;cursor: pointer;
 }
 span.on{
  background-color: orange;
 }
 </style>
</head>
<body>
 <p class="container">
 <ul class="list" style="left: 0px">
  <li><img src="./images/1.png" alt=""></li>
  <li><img src="./images/2.png" alt=""></li>
  <li><img src="./images/3.png" alt=""></li>
  <li><img src="./images/4.png" alt=""></li>
  <li><img src="./images/5.png" alt=""></li>
  <li><img src="./images/1.png" alt=""></li>
 </ul>
 <p class="nav">
  <span class="on"></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
 </p>
 <em class="next btn">></em>
 <em class="pre btn"><</em>
 </p>
 <script type="text/javascript" src="../jquery.js"></script>
 <script type="text/javascript">
 $(function(){
  var i=0;
  $(&#39;.next&#39;).click(function(){
  i++;
  console.log(i);
 
  moveImg(i);
   
  });
  $(&#39;.pre&#39;).click(function(){
  i--;
  moveImg(i);
   
  });
  $(&#39;.nav span&#39;).click(function(){
  var _index=$(this).index();
  i=_index;
  moveImg(i);
 
   
  });
  // i的作用：决定下一张图片是谁————也就是说ul的left是多少。
  // $(&#39;.list&#39;).css({left)的值是从图a过度是此时的ul的left。
  function moveImg(){
  if (i==6) {
   i=1;
   $(&#39;.list&#39;).css({&#39;left&#39;:&#39;0&#39;});
  }
   // 是第一张
  if(i==-1){
   i=4;
   $(&#39;ul&#39;).css({left:(5*-273)});
  }
  $(&#39;.list&#39;).stop().animate({&#39;left&#39;:-273*i+&#39;px&#39;},1000);
  if (i==5) {
  $(&#39;.nav span&#39;).eq(0).addClass(&#39;on&#39;).siblings().removeClass(&#39;on&#39;);
 
  }
  $(&#39;.nav span&#39;).eq(i).addClass(&#39;on&#39;).siblings().removeClass(&#39;on&#39;);
 
  }
 })
 </script>
</body>
</html>

The above is the entire content of this article. I hope it will be helpful to everyone’s study, and I hope you can support me a lot. Script House.

The above is the detailed content of JavaScript implements seamless scrolling effect of carousel images. For more information, please follow other related articles on the PHP Chinese website!

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

Previous article：Implementation of javascript imitation Taobao search box input eventNext article：Implementation of javascript imitation Taobao search box input event

See more

JavaScript implements seamless scrolling effect of carousel images

Related articles