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jQuery implements scrolling effect

韦小宝Original: 2018-01-16 11:15:451060browse

This article mainly introduces jQuery to achieve scrolling effect in detail. It has certain reference and value for learning jquery. Friends who are interested in jquery can refer to this article.

The example of this article is We have shared the specific code for jQuery to implement scrolling effect display for your reference. The specific content is as follows

1. Image carousel:

The principle is as follows:

Suppose there are three pictures. The three pictures actually exist on the page. However, due to the set size of the visible part (the width is mainly considered here) is less than or equal to The size of one picture. If you want to see other pictures, the most direct idea is to place the picture that needs to be displayed in the visual area, which means that what needs to be changed is the offset of the entire picture area. Value (left/right)

Specific implementation:

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <title></title>
 <script type="text/javascript" src="jquery.min.js"></script>
 <link rel="stylesheet" type="text/css" href="./style.css" rel="external nofollow" >
</head>
<body>
 <p class="carousel">
 <p class="Con">
 <!-- 轮播(carousel)项目 -->
  <p class="scroll">
  <img src="./pic/1.jpg">
  <img src="./pic/2.jpg">
  <img src="./pic/3.jpg">
  <img src="./pic/4.jpg">
  <img src="./pic/5.jpg">
  <img src="./pic/6.jpg">
  <img src="./pic/7.jpg">  
  </p>

  <!-- 轮播(carousel)指标 -->
  <p class="But">
  <span class="active"></span> <!-- 0 * img.width -->
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  <span></span>
  </p> 
 </p>

 <!-- 轮播(carousel)导航 -->
 <a href="javascript:void(0)" class="prev" data-slide="prev"> << </a>
 <a href="javascript:void(0)" class="next" data-slide="next"> >> </a>
 </p>
</body>
</html>

js part:

$(function() {
 var _index = 0;
 var time = 0;
 $(".But span").click(function() {
 _index = $(this).index();
 play(_index);
 });

 function play(index) {
 $(".But span").eq(index).addClass(&#39;active&#39;).siblings(&#39;span&#39;).removeClass(&#39;active&#39;);
 $(&#39;.scroll&#39;).animate({left: -(_index*1024)}, 500);
 }

 function autoPlay() {
 time = setInterval(function() {
 _index++;
 if(_index > 6) {
 $(&#39;.scroll&#39;).css("left", 0);
 _index = 0;
 }
 play(_index);
 }, 3000);
 }
 autoPlay();
 $(&#39;.prev&#39;).click(function() {
 if(_index <= 0) {
 return;
 }
 clearInterval(time);

 play(--_index);
 autoPlay();
 });
 $(&#39;.next&#39;).click(function() {
 if(_index >= 6) {
 return;
 }
 clearInterval(time);
 play(++_index);
 autoPlay();
 });  
});

2. Scroll up and down

Here is text scrolling as an example: using timer, after a certain time interval, continuously insert the last li element in ul into the first li element of ul

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <title></title>
 <script type="text/javascript" src="jquery.min.js"></script>
 <style type="text/css">
 .ul-list li {
 text-decoration: none;
 list-style: none;
 }
 </style>
</head>
<body>
 <ul class="ul-list">
 <li><a href="#">本地数据正反查询的实现例子</a></li>
 <li><a href="#">A-star寻路算法</a></li>
 <li><a href="#">node.js的querystring.stringify的使用</a></li>
 <li><a href="#">利用事件委托写一个简易扫雷游戏</a></li>
 <li><a href="#">懒加载（延迟加载）</a></li>
 <li><a href="#">JS中XML的解析</a></li>
 </ul>
 <script type="text/javascript">
 setInterval(function() {
 $(&#39;.ul-list li:last&#39;).css({&#39;height&#39;:&#39;0px&#39;, &#39;opacity&#39;:"0"}).insertBefore(".ul-list li:first").animate({&#39;height&#39;:&#39;25px&#39;, &#39;opacity&#39;: &#39;1&#39;}, &#39;slow&#39;, function() {
 $(this).removeAttr(&#39;style&#39;);
 })
 }, 3000);
 </script>
</body>
</html>

The above is all the content of this article, I hope it can help everyone learn! !

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