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Native js implements image cascading carousel switching effect_javascript skills

WBOYOriginal: 2016-05-16 15:16:302892browse

This article introduces the js focus image cascading carousel switching scrolling effect through an example, and shares it with everyone for your reference. The specific content is as follows

Rendering:

Function description:

　Customize image size;
Automatically scroll pictures every time;
Each time the animation is executed, the position of the image changes, and the width, height and other attributes also change accordingly;
Move the mouse over the picture to display the detailed information of the current picture;
Click the button to scroll forward and backward;

Detailed code:
HTML code:

<!DOCTYPE html>
<!-- saved from url=(0062)http://x1.xiuimg.com/style/xiu/woxiu/v1/tpl/topic/xiuxuan.html -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title></title>
<style type="text/css">
 *{margin:0px; padding:0px;font-family:"Microsoft YaHei"}
 ol,ul{list-style:none;}
 cite,em,i{font-style:normal} 
 * html .clearfix { height: 1%; }
 .clearfix { display: block; }
 .myclearfix:after { clear:both; visibility:hidden;}
 .myclearfix { display: block; _display:inline-block; overflow:hidden;} 

 #largerImages{position:relative;width:1000px;margin:0 auto;height:520px;overflow:hidden;}
 #largerImages li{box-shadow:1px 1px 12px rgba(200, 200, 200, 1);width:368px;height:368px; position:absolute;top:10px;overflow:hidden;color:#fff;}
 #largerImages li .cover{background-color:#333;opacity:0.5;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);height:100%;width:100%;display:block;position:absolute;top:0px;}
 #largerImages img{border:0px;width:100%;height:100%;}
 #largerImages .previous{left:13%;}
 #largerImages .next{left:53%;}
 #largerImages .previous,#largerImages .next{cursor:pointer; position:absolute;z-index:100; top:25%;height:60px;line-height:60px;width:30px;color:#fff;text-align:center;}
 #largerImages .previous span,#largerImages .next span{position:absolute;top:0px;left:0px;height:100%;width:100%;display:block;background-color:#000;opacity:0.4;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=40);}
 #largerImages .previous em,#largerImages .next em{height:100%;width:100%;display:block;position:absolute;top:0px;left:0px;font-size:26px; font-family: "宋体";}
 #largerImages li span,#largerImages li em{position:absolute;left:0px;width:100%;height:30px;line-height:30px; bottom:0px;text-align:center;display:block;color:#fff;}
 #largerImages li span{background-color:#000;opacity:0.5;filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);font-size:12px;}

</style>
</head>
<body>

<ul id = "largerImages">
 <p class="previous"><span> </span><em><</em></p>
 <p class="next"><span> </span><em>></em></p>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/96/58/dc15170219625_b_56.com_151201150445.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/96/58/dc15170219625_b_56.com_151201150445.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
 <li><i class="cover"> </i>
  <a href="#"><img src="http://xiu.xiuimg.com/upload/xiu/9/90/qq-srntbvlhcw_b_56.com_160106133546.jpg"></a>
  <p class="tab_name"><span> </span><em>主播昵称</em></p>
 </li>
</ul>

<script type="text/javascript" src="../../lib/seajs/sea.js"></script>
<script type="text/javascript" src="../../lib/base/1.0.x/base.js"></script>
<script type="text/javascript">
 seajs.use(['lib/jquery/1.11.x/index.js','_example/rotateBox/index.js'],function($,carousel) {
  carousel.init({
   wapper: $('#largerImages'),

   //所有图片以此来按比例定义宽高
   imgWidth: 450,
   imgHeight: 300,

   spacing: {
    left: 60, //每张图片左边距离相差多少
    top: 30, //每张图片顶部距离相差多少
    width: 60, //每张图片宽度相差多少
    height: 60 //每张图片高度相差多少
   }
  });
 });
</script>
</body>
</html>

js code:

define(function(require, exports, module) {
 'use strict';
 var $ = require('lib/jquery/1.11.x/index.js');

 var carousel = {

  _initData:false, //判断动画是否执行完毕

  init: function(options) {
   var t = this;
   t._wapper = options.wapper;
   t._grids = t._wapper.find('li');
   t._gridsWidth = options.imgWidth;
   t._gridsHeight = options.imgHeight; 
   t._spacing = options.spacing;

   //取居中图片
   t._middle = t._grids.length % 2 == 0 &#63; t._grids.length / 2 : parseInt(t._grids.length / 2);

   //存放各图片参数
   t._arr = {
    left: [],
    top: [],
    zIndex: [],
    width: [],
    height: []
   }

   if ( !t._initData ) {
    var interval;
    interval = setInterval(function(){
     $('.previous').click();
    },10000);
   }

   t._largerImages();
   t._reposition();
   t._mouseEnter(t._grids) //鼠标移动上去显示主播昵称
  },
  //初始化定位：
  _largerImages: function() {
   var t = this;

   var front = t._middle;
   var avtive = t._middle;
   var last = t._grids.length;

   t._grids.each( function(i, img) {
    
    if (i == t._middle) {

     t._grids.eq(i).css({
      zIndex: 99,
      top: 0,
      left: t._spacing.left * i,
      height: t._gridsHeight,
      width: t._gridsWidth
     }); 

    } else if ( i < t._middle ) {

     t._grids.eq(i).css({
      zIndex: i,
      top: t._spacing.top * front,
      left: t._spacing.left * i,
      height: t._gridsHeight - t._spacing.height * front,
      width: t._gridsWidth - t._spacing.width * front
     });
     
     front--;

    } else {

     last --;

     t._grids.eq(last).css({
      zIndex: i,
      top: t._spacing.top * avtive,

      left: t._spacing.left * last + t._spacing.width * avtive,
      height: t._gridsHeight - t._spacing.height * avtive,
      width: t._gridsWidth - t._spacing.width * avtive
     });

     avtive --;
    };
   });
  },
  //翻页动画
  _reposition: function() {
   var t = this;

   //把各属性值传到数组里面
   t._grids.each( function(i,img) {
    t._arr.left.push(t._grids.eq(i).position().left);
    t._arr.top.push(t._grids.eq(i).position().top);
    t._arr.width.push(t._grids.eq(i).width());
    t._arr.height.push(t._grids.eq(i).height());
    t._arr.zIndex.push(t._grids.eq(i).css('z-index'));
   });

   //向前翻页
   $('.previous').bind('click',function() {
    if ( !t._initData && t._arr.left.length != 0) {

     t._initData = true;

     //重新获取选择器
     var grids = t._wapper.find('li'); 
     
     for (var i = 1; i < grids.length ; i ++) {

      grids.eq(i).animate({
       zIndex: t._arr.zIndex[i - 1],
       left: t._arr.left[i - 1],
       top: t._arr.top[i - 1], 
       width: t._arr.width[i - 1], 
       height: t._arr.height[i - 1],
      },200,
      function() {
       t._initData = false;
       grids.find('i').addClass('cover');
       grids.eq(t._middle + 1).find('i').removeClass('cover');
      });
     };

     grids.eq(0).animate({
      left: t._arr.left[ grids.length - 1], 
      top: t._arr.top[ grids.length - 1], 
      width: t._arr.width[ grids.length - 1], 
      height: t._arr.height[ grids.length - 1],
      zIndex: t._arr.zIndex[ grids.length - 1]
     },200,
     function(){
      $(this).appendTo(t._wapper);
     });

    }
   });
   //向后翻页
   $('.next').bind('click',function() {
    if ( !t._initData && t._arr.left.length != 0) {

     t._initData = true;

     //重新获取选择器
     var grids = t._wapper.find('li'); 
     
     for (var i = 0; i < grids.length - 1; i ++) {
      grids.eq(i).animate({
       left: t._arr.left[i + 1],
        top: t._arr.top[i + 1], 
        width: t._arr.width[i + 1], 
        height: t._arr.height[i + 1],
        zIndex: t._arr.zIndex[i + 1]
        },200,function() {
        t._initData = false;
       });
     };
     grids.eq(grids.length - 1).animate({
      left: t._arr.left[0], 
      top: t._arr.top[0], 
      width: t._arr.width[0], 
      height: t._arr.height[0],
      zIndex: t._arr.zIndex[0]
     },200,
     function(){
      $(this).prependTo(t._wapper);
      grids.find('i').addClass('cover');
      grids.eq(t._middle - 1).find('i').removeClass('cover');
     });

    }
   });
  },
  //鼠标进入图片效果
  _mouseEnter: function(grids) {
   grids.each(function(i){
    $(this).mouseenter(function() {
     $(this).find('.tab_name').animate({
      bottom:0,opacity: 'show'
     },200);
    });
    $(this).mouseleave(function() {
     $(this).find('.tab_name').animate({
      bottom:-50,opacity: 'hide'
     },200);
    });
   });
  },
 };

 return carousel;
});

The above is the entire content of this article, I hope it will be helpful to everyone’s study.

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