我正在使用运行良好的 vTicker，但是在项目循环之后，它们会丢失基于它们的伪类的 css 属性。这个想法是让第一个和最后一个孩子具有相同的不透明度，第二个和倒数第二个，依此类推，中间项目为 100% 不透明度。
我也考虑添加类来控制它，例如：
<ul>
<li class="item-1">Text</li>
<li class="item-2">Text</li>
</ul>
但是一旦 item-1 循环通过，它就会在保持类名的同时进入列表的底部。即使在 vTicker 重新排序后，我也需要类名“item-1”始终与列表中的第一项保持一致。
我该怎么做呢？这是 vTicker 的代码：
/*! vTicker 1.14
http://richhollis.github.com/vticker/ | http://richhollis.github.com/vticker/license/ | based on Jubgits vTicker http://www.jugbit.com/jquery-vticker-vertical-news-ticker/ */
(function(d){var m={speed:700,pause:4E3,showItems:1,mousePause:!0,height:0,animate:!0,margin:0,padding:0,startPaused:!1},c={moveUp:function(a,b){c.animate(a,b,"up")},moveDown:function(a,b){c.animate(a,b,"down")},animate:function(a,b,e){var c=a.itemHeight,f=a.options,g=a.element.children("ul"),k="up"===e?"li:first":"li:last",l=g.children(k).clone(!0);0<f.height&&(c=g.children("li:first").height());c+=f.margin+2*f.padding;"down"===e&&g.css("top","-"+c+"px").prepend(l);if(b&&b.animate){if(a.animating)return;
a.animating=!0;g.animate("up"===e?{top:"-="+c+"px"}:{top:0},f.speed,function(){d(g).children(k).remove();d(g).css("top","0px");a.animating=!1})}else g.children(k).remove(),g.css("top","0px");"up"===e&&l.appendTo(g)},nextUsePause:function(){var a=d(this).data("state"),b=a.options;a.isPaused||2>a.itemCount||f.next.call(this,{animate:b.animate})},startInterval:function(){var a=d(this).data("state"),b=this;a.intervalId=setInterval(function(){c.nextUsePause.call(b)},a.options.pause)},stopInterval:function(){var a=
d(this).data("state");a&&(a.intervalId&&clearInterval(a.intervalId),a.intervalId=void 0)},restartInterval:function(){c.stopInterval.call(this);c.startInterval.call(this)}},f={init:function(a){f.stop.call(this);var b=jQuery.extend({},m);a=d.extend(b,a);var b=d(this),e={itemCount:b.children("ul").children("li").length,itemHeight:0,itemMargin:0,element:b,animating:!1,options:a,isPaused:a.startPaused?!0:!1,pausedByCode:!1};d(this).data("state",e);b.css({overflow:"hidden",position:"relative"}).children("ul").css({position:"absolute",
margin:0,padding:0}).children("li").css({margin:a.margin,padding:a.padding});isNaN(a.height)||0===a.height?(b.children("ul").children("li").each(function(){var a=d(this);a.height()>e.itemHeight&&(e.itemHeight=a.height())}),b.children("ul").children("li").each(function(){d(this).height(e.itemHeight)}),b.height((e.itemHeight+(a.margin+2*a.padding))*a.showItems+a.margin)):b.height(a.height);var h=this;a.startPaused||c.startInterval.call(h);a.mousePause&&b.bind("mouseenter",function(){!0!==e.isPaused&&
(e.pausedByCode=!0,c.stopInterval.call(h),f.pause.call(h,!0))}).bind("mouseleave",function(){if(!0!==e.isPaused||e.pausedByCode)e.pausedByCode=!1,f.pause.call(h,!1),c.startInterval.call(h)})},pause:function(a){var b=d(this).data("state");if(b){if(2>b.itemCount)return!1;(b.isPaused=a)?d(this).addClass("paused"):d(this).removeClass("paused")}},next:function(a){var b=d(this).data("state");if(b){if(b.animating||2>b.itemCount)return!1;c.restartInterval.call(this);c.moveUp(b,a)}},prev:function(a){var b=
d(this).data("state");if(b){if(b.animating||2>b.itemCount)return!1;c.restartInterval.call(this);c.moveDown(b,a)}},stop:function(){d(this).data("state")&&c.stopInterval.call(this)}};d.fn.vTicker=function(a){if(f[a])return f[a].apply(this,Array.prototype.slice.call(arguments,1));if("object"!==typeof a&&a)d.error("Method "+a+" does not exist on jQuery.vTicker");else return f.init.apply(this,arguments)}})(jQuery);