在旋转木马循环上正确地预置元素

Question

我正在尝试修复一个问题，当我触发我的轮播上的previous按钮以预先添加元素时，元素从最后一个位置弹出到第一个位置。我做了一个循环，这样当我点击触发器时，滑块将首先滑动，然后旋转木马上的最后一个元素将从最后一个位置移动到第一个位置。不幸的是，如果你检查下面的代码，过渡并不顺利。在将最后一个元素从最后一个位置移动到第一个位置之前，jquery prepend有一个小延迟。是否有适当的方法来实现循环。

(function ($) {
        'use strict';

        var carousel = {

            init : function() {

                var carouselWidth = 0,
                    itemListContainer = $('.item-list').width(),
                    itemList = $('.carousel .item-list ul li'),
                    containerWidth = $('.carousel .item-list').innerWidth(),
                    browserWidth = $(window).width(),
                    itemWidth = itemList.outerWidth( containerWidth / 3 ),
                    itemSize = itemWidth.outerWidth();


                //Set Container Width
                $('.carousel .item-list ul').children().each(function() {
                    carouselWidth += $(this).outerWidth(true);
                    $('.carousel .item-list ul').outerWidth(carouselWidth);
                });


                var offset = itemSize * 3;
              

               // function dynamicItemWidth() {
               //      if ( $('body') <= 1024 ) {
               //          itemWidth = itemList.width( itemListContainer / 5 );
               //      }

               //      if ( $('body') <= 480 ) {
               //          itemWidth = itemList.width( itemListContainer / 2 );
               //      }

               //      if ( $('body') <= 320 ) {
               //          itemWidth = itemList.width( itemListContainer / 1 );
               //      }

               //  }

                // var itemWidth = itemList.width( browserWidth / 5 ),
                //     itemSize = itemWidth.width();

                $('.carousel .item-list ul').prepend( $('.carousel .item-list ul li:last') );

                $('.carousel .item-list ul').css('left', '-' +  itemSize + 'px'  );


                $('.btns .next').click(function(){

                    var move = $('.carousel .item-list ul li').outerWidth();
                    var leftIndent = parseInt($('.carousel .item-list ul').css('left')) - move;

                    function animate( repeat, speed ) {
                        $('.carousel .item-list ul:not(:animated)').animate({'left' : leftIndent}, speed,function(){
                            $('.carousel .item-list ul').append( $('.carousel .item-list ul li:first') );
                            $('.carousel .item-list ul').css({'left' : '-' +  move + 'px'});

                            if ( repeat > 1 ) {
                                animate( ( repeat - 1 ), speed );                     }
                        });
                    }

                    animate( 1, 300 );

                });

                $('.btns .prev').click(function() {

                    var move = $('.carousel .item-list ul li').outerWidth();
                    var leftIndent = parseInt($('.carousel .item-list ul').css('left')) + move;

                    function animate( repeat, speed ) {
                        $('.carousel .item-list ul:not(:animated)').animate({'left' : leftIndent}, speed,function(){
                            $('.carousel .item-list ul').prepend($('.carousel .item-list ul li:last'));
                            $('.carousel .item-list ul').css({'left' : '-' + move + 'px'});

                            if ( repeat > 1 ) {
                                animate( ( repeat - 1 ), speed );
                            }
                        });
                    }

                    animate( 1, 300 );

                });

            }

        }

        $(document).ready(function(){
            carousel.init();
        });


        $(window).on('resize', function() {
            carousel.init();  
        })

    })(jQuery);

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
   margin: 0;
   padding: 0;
   border: 0;
   font-size: 100%;
   font: inherit;
   vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */

article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
   display: block;
}

body {
   line-height: 1;
}

ol, ul {
   list-style: none;
}

blockquote, q {
   quotes: none;
}

blockquote:before, blockquote:after, q:before, q:after {
   content: '';
   content: none;
}

table {
   border-collapse: collapse;
   border-spacing: 0;
}

* {
   -webkit-box-sizing: border-box;
   -moz-box-sizing: border-box;
   box-sizing: border-box;
}

/* -- #Carousel -- */

.carousel {
   position: relative;
}

.carousel .item-list {
   max-width: 1366px;
   margin: 0 auto;
   border: 1px solid #000;
   box-sizing: content-box;
}

.carousel .item-list ul {
   display: flex;
   flex-wrap: wrap;
   list-style: none;
   margin-bottom: 10px;
   position: relative;
   overflow: hidden;
}

.carousel .btns {
   width: 100%;
   z-index: 10;
   top: 50%;
}

.carousel .btns li {
   display: inline-block;
   cursor: pointer;
}

.carousel.-aim-partners {
   position: relative;
}

.carousel.-aim-partners .item-list {
   margin: 0 auto;
}

.carousel.-aim-partners .item-list ul li {
   float: left;
   width: 230px;
   height: 110px;
   margin-top: 10px;
   margin-bottom: 10px;
   background-size: contain;
   background-repeat: no-repeat;
   background-position: center;
   background-color: beige;
}

.carousel.-aim-partners .btns {
   width: 110%;
   left: -70px;
}

.carousel.-aim-partners .btns li {
   width: 35px;
   height: 40px;
}

.carousel.-aim-partners .btns li.prev {
   background: url("../images/carousel-icon-arrow.png") no-repeat 15px 0;
}

.carousel.-aim-partners .btns li.next {
   background: url("../images/carousel-icon-arrow.png") no-repeat -20px 0;
}

/* -- End Carousel -- */

/*# sourceMappingURL=style.css.map */

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
    <div class='carousel -aim-partners'>

      <div class='item-list'>
          <ul>
              <li>1</li>
              <li>2</li>
              <li>3</li>
              <li>4</li>
              <li>5</li>
              <li>6</li>
              <li>7</li>
              <li>8</li>
              <li>9</li>
              <li>10</li>
              <li>11</li>
              <li>12</li>
              <li>13</li>
              <li>14</li>
              <li>15</li>
              <li>16</li>             
              
          </ul>
      </div>


        <ul class="btns">
            <li class="prev">
                <i class="fa fa-angle-left" aria-hidden="true">prev</i>
            </li>
            <li class="next">
                <i class="fa fa-angle-right" aria-hidden="true">next</i>
            </li>
        </ul>

    </div>
</div>

Answer 1

更改动画的方式会影响视图。结帐this fiddle。我用不同的动画方法创建了一个简单的例子。

$('.prev').click(function(){
  $('.slide li:last').css('width',0);
  $('.slide li:last').prependTo('.slide');
  $('.slide li:first').animate({width: '98px'});
});