How to implement jQuery scrolling effect-JS Tutorial-php.cn

How to implement jQuery scrolling effect

小云云

Release： 2018-01-18 11:45:12

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This article mainly introduces jQuery to realize the scrolling effect in detail, which has certain reference value. Interested friends can refer to it. I hope it can help everyone.

1. Picture carousel:

The principle is as follows:

Assume there are three pictures, The three pictures actually exist on the page, but since the size of the set visible part (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 It means placing the picture that needs to be displayed in the visible area, which means that what needs to be changed is the offset value (left/right) of the entire picture area

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>

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$(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();
 });  
});

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2. Scroll up and down

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

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