Question

我们需要你们的帮助。我正在检查其中的内容。首先,如果发言有效,则不是...... 我甚至尝试过这样的事情,但却没有工作:

else if(($( .current ).prev().hasClass( green )){
    alert( Green is Before the current Picture );
     }

I want to accomplish this: if green is before class "current" alert "Green is Before the current Picture s". Can someone help me out? Thank you!

http://jsfiddle.net/zresC/“rel=“nofollow”>Fiddle。

我有这一法典:

 var $green=$( .green:not(:nth-child(6)) );

$( .greencontroll ).click(function(){

  if($green.next($( .current ).length)){
   alert( Green is After the current Picture );
}

  else if($green.prev($( .current ).length)){
      alert( Green is Before the current Picture );
      }

Answer 1

假设要素是:

var $elements = $( .current ).siblings().andSelf();

var curIndex = $elements.index(".current");
var greenIndex = $elements.index(".green");

if(curIndex > greenIndex){
   // before
}

您的法典问题是prev。仅仅在要素之前就立即获得兄弟姐妹,而不是所有以前的兄弟姐妹。

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