Implementation example of JQuery image carousel effect-JS Tutorial-php.cn

Implementation example of JQuery image carousel effect

黄舟

Release： 2017-10-26 10:27:35

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The following editor will bring you an example of using JQuery to achieve the image carousel effect (recommended). The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor and take a look.

[The effect is shown in the picture]

##[Brief description of the principle]

Here is a brief introduction to the entire process:

1, hide all pictures except the first one,

2, Get the alt information of the first picture and display it in the information bar, and add a click event

3, add click listeners to the 4 buttons, click the corresponding button, and use the fadeOut and fadeIn methods to display the picture

4, set setInterval, execute the switching function regularly

[Code Description]

filter(":visible"): Get all visible elements

unbind(): Remove the bound event from the matched element

siblings: Get an element set containing all unique sibling elements of each element in the matched element set

[Program source code]

First introduce the JS file:

　 <script src="bootstrap/js/jquery-1.11.2.min.js"></script>
    <script src="bootstrap/js/bootstrap.min.js"></script>
    <link href="bootstrap/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" type="text/css"/>

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HTML part:

<p id="banner"> 
   <ul>
    <li class="on"><a href="">1</a></li>
    <li><a href="">2</a></li>
    <li><a href="">3</a></li>
    <li><a href="">4</a></li>
    <li><a href="">5</a></li>
    <li><a href="">6</a></li>
   </ul>
   <p id="banner_list">
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a1.jpg" width="280" height="160" /></a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a2.jpg" width="280" height="160" /></a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a3.jpg" width="280" height="160" /></a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a4.jpg" width="280" height="160" /></a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a5.jpg" width="280" height="160" /></a>
    <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_self"><img src="img/a6.jpg" width="280" height="160" /></a>
   </p>
  </p>

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CSS part:

<style type="text/css">
 #banner {position:relative; width:280px; height:160px; border:1px solid #666; overflow:hidden;}
 #banner ul { width:138px; height:18px;position:absolute;list-style-type:none;filter: Alpha(Opacity=80);opacity:0.8;z-index:1002;
    margin:0; padding:0; bottom:3px; right:5px; line-height: 18px; text-align: center;}
 #banner ul li { width: 18px; height: 18px; margin:0px 2px;float:left;display:block;color:#FFF;
　　　　　　　　　　 border:#e5eaff 1px solid;background:#6C6D6E;cursor:pointer} 
 #banner ul li.on { background:#900}
 #banner ul li a { color: white;}
 #banner ul li a:hover{text-decoration: none;}
 #banner_list a{position:absolute;} <!-- 让六张图片都可以重叠在一起-->
 #banner_list{position:absolute; right: 5px; bottom: 5px;}
 </style>

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JS part:

<script type="text/javascript">
 var t = n =0, count;
 $(document).ready(function(){ 
  count=$("#banner_list a").length;
  $("#banner_list a:not(:first-child)").hide();
  $("#banner_info").html($("#banner_list a:first-child").find("img").attr(&#39;alt&#39;));
  $("#banner_info").click(function(){window.open($("#banner_list a:first-child").attr(&#39;href&#39;), "_blank")});
  $("#banner li").click(function() {
   var i = $(this).text() -1;//获取Li元素内的值，即1，2，3，4
   n = i;
   if (i >= count) return;
   $("#banner_info").html($("#banner_list a").eq(i).find("img").attr(&#39;alt&#39;));
   $("#banner_info").unbind().click(function(){window.open($("#banner_list a").eq(i).attr(&#39;href&#39;), "_blank")})
   $("#banner_list a").filter(":visible").fadeOut(500).parent().children().eq(i).fadeIn(1000);
   document.getElementById("banner").style.background="";
   $(this).toggleClass("on");
   $(this).siblings().removeAttr("class");
  });
  t = setInterval("showAuto()", 4000);
  $("#banner").hover(function(){clearInterval(t)}, function(){t = setInterval("showAuto()", 4000);});
 })
 
 function showAuto()
 {
  n = n >=(count -1) ?0 : ++n;
  $("#banner li").eq(n).trigger(&#39;click&#39;);
 }
 </script>

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