Empty child object

Reported by:	jannis.hell@adesso.de	Owned by:	jannis.hell@adesso.de
Priority:	high	Milestone:	None
Component:	traversing	Version:	1.8.0
Keywords:		Cc:	timmywil, dmethvin
Blocked by:		Blocking:

Description

I have a list with 82 entries. After pressing a button I want to cut it in half.

  $( 'button' ).on( "click", function() {
    var elements = 0;
    $( 'ul' ).each( function() {
      elements = Math.floor( $( this ).children().length / 2 );
      var nextAll = $( this ).children( ":nth-child(" + elements + ")" ).nextAll();
      $('<ul>').append(nextAll).insertAfter($( this ));
    } );
  } );

Works perfectly in 1.7 and 1.8 for the first Click on the button.

Keeps generating empty Lists in 1.8 after that while working in 1.7.

Attachments (0)

Change History (9)

Changed August 13, 2012 03:37PM UTC by timmywil comment:1

owner:	→ jannis.hell@adesso.de
status:	new → pending

Thanks for taking the time to contribute to the jQuery project! Please provide a complete reduced test case on jsFiddle to help us assess your ticket.

Additionally, be sure to test against the jQuery Edge version to ensure the issue still exists. To get you started, use this boilerplate: http://jsfiddle.net/FrKyN/. Open the link and click to "Fork" (in the top menu) to get started.

Changed August 28, 2012 08:35AM UTC by trac-o-bot comment:2

resolution:	→ invalid
status:	pending → closed

Because we get so many tickets, we often need to return them to the initial reporter for more information. If that person does not reply within 14 days, the ticket will automatically be closed, and that has happened in this case. If you still are interested in pursuing this issue, feel free to add a comment with the requested information and we will be happy to reopen the ticket if it is still valid. Thanks!

Changed August 31, 2012 01:59PM UTC by anonymous comment:3

<!DOCTYPE html>
<html>
<head>
  <title></title>
  <style type="text/css">
    <!--
    ul{ width:125px; float:left; display:block; }
    button{ clear:both; display:block; }
    -->
  </style>
</head>
<body>
<div>
<h2>Mitwirkende</h2>
<ul>
<li>
  <a href="#">Ackner, Johannes</a>
</li>
<li>
  <a href="#">Adašević, Borivoje</a>
</li>
<li>
  <a href="#">Adam, Ines</a>
</li>
<li>
  <a href="#">Adam, Christian</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Addai, Patrick K.</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#">Adler, Eric</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Adler, Silvia</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#">Adorján, Johanna</a>
</li>
<li>
  <a href="#">Aeckersberg, Tanja</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Aerni, Urs Heinz</a>
  <br>
  <span>Foto: Rainer Haake/Cortex Unit Verlag</span>
</li>
<li>
  <a href="#">Aguigah, René</a>
</li>
<li>
  <a href="#">Ahlheim, Rose</a>
</li>
<li>
  <a href="#">Ahlheim , Klaus </a>
</li>
<li>
  <a href="#">Ahlrichs, Domenika</a>
</li>
<li>
  <a href="#">Ahrberg, Edda</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Ahrens, S. F.</a>
  <br>
  <span>Foto: Derk Janssen Verlag</span>
</li>
<li>
  <a href="#">Ahrens, Maren</a>
</li>
<li>
  <a href="#">Ahrndt, Erich</a>
</li>
<li>
  <a href="#">Aichinger, Cornelia</a>
</li>
<li>
  <a href="#">Aistermann, Cornelia</a>
</li>
<li>
  <a href="#">Akrap, Doris</a>
</li>
<li>
  <a href="#">Alagjozovski, Robert</a>
</li>
<li>
  <a href="#">Albath, Maike</a>
</li>
<li>
  <a href="#">Albers, Jürgen</a>
</li>
<li>
  <a href="#">Albert, Claudia</a>
</li>
<li>
  <a href="#">Albrecht, Jörg</a>
</li>
<li>
  <a href="#">Alef, Rob</a>
</li>
<li>
  <a href="#">Alexijewitsch, Swetlana</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Altmann, Andreas</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#">Altura, Nessa</a>
</li>
<li>
  <a href="#">Alwart, Jenny</a>
</li>
<li>
  <a href="#">Amann, Jürg</a>
</li>
<li>
  <a href="#">Amelin, Maxim</a>
</li>
<li>
  <a href="#">Amend, Christoph</a>
</li>
<li>
  <a href="#">Amm, Veronika</a>
</li>
<li>
  <a href="#">Amtsberg, Sven</a>
</li>
<li>
  <a href="#">Anaconda, Endo</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Ananda, Gen Kelsang</a>
  <br>
  <span>Foto: KMC Deutschland</span>
</li>
<li>
  <a href="#">Anaschewitsch, Alexander</a>
</li>
<li>
  <a href="#">Anders, Klaus-Peter</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Anders, Klaus</a>
  <br>
  <span>Foto: Jerome Müller Dupage</span>
</li>
<li>
  <a href="#">Anders, Veit</a>
</li>
<li>
  <a href="#">Anders, Christian </a>
</li>
<li>
  <a href="#">Andersen, Frithjof</a>
</li>
<li>
  <a href="#">Andersson, Max</a>
</li>
<li>
  <a href="#">Andonovski, Venko</a>
</li>
<li>
  <a href="#">Andrews, Florian</a>
</li>
<li>
  <a href="#">Andruchowytsch, Juri</a>
</li>
<li>
  <a href="#">Angele, Michael</a>
</li>
<li>
  <a href="#">Angermayer, Karen Christine </a>
</li>
<li>
  <a href="#">Annel, Ulf</a>
</li>
<li>
  <a href="#">Annel, Ingrid</a>
</li>
<li>
  <a href="#">Anrather, Florian</a>
</li>
<li>
  <a href="#">Ansfeld, Karin</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Anton, Karl</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#">Apel, Dietmar Martin</a>
</li>
<li>
  <a href="#">Apelt, Andreas H.</a>
</li>
<li>
  <a href="#">Appelfeller, Uwe</a>
</li>
<li>
  <a href="#">Appelmann, Karl-Heinz</a>
</li>
<li>
  <a href="#">Apstein-Müller, Ann Catrin</a>
</li>
<li>
  <a href="#">Arabin, Inka</a>
</li>
<li>
  <a href="#">Arapi, Lindita</a>
</li>
<li>
  <a href="#">Arndt, Timotheus</a>
</li>
<li>
  <a href="#">Arnold, Runhild</a>
</li>
<li>
  <a href="#">Arnold, Günter</a>
</li>
<li>
  <a href="#">Arpen</a>
</li>
<li>
  <a href="#">Arslani, Merita</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Artmann, Andreas</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#"></a>
  <a href="#">Arzenheimer, Melanie</a>
  <br>
  <span>Foto: privat/chiliverlag</span>
</li>
<li>
  <a href="#">Asado, Susie</a>
</li>
<li>
  <a href="#">Asbeck, Herbert</a>
</li>
<li>
  <a href="#">Aschenbach, Hans-Georg</a>
</li>
<li>
  <a href="#">Asel, Harald</a>
</li>
<li>
  <a href="#">Asllani, Persida</a>
</li>
<li>
  <a href="#">Assmann, Heinz-Dieter</a>
</li>
<li>
  <a href="#">Aue, Daniela</a>
</li>
<li>
  <a href="#">Auerbacher, Inge</a>
</li>
<li>
  <a href="#">Auffermann, Verena</a>
</li>
<li>
  <a href="#">Augstein, Tilo</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Augstein, Jakob</a>
  <br>
  <span>Foto: privat</span>
</li>
<li>
  <a href="#">Aurich, Margit</a>
</li>
<li>
  <a href="#">Aust, Stefan</a>
</li>
<li>
  <a href="#"></a>
  <a href="#">Autschbach, Peter</a>
  <br>
  <span>Foto: Manfred Pollert</span>
</li>
<li>
  <a href="#">Avanessian, Armen</a>
</li>
</ul>
<button>Halbieren</button>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
<!--<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.min.js"></script>-->
<script>
  $( 'button' ).on( "click", function() {
    var elements = 0;
    $( 'ul' ).each( function() {
      elements = Math.floor( $( this ).children().length / 2 );
      var nextAll = $( this ).children( ":nth-child(" + elements + ")" ).nextAll();
      $('<ul>').append(nextAll).insertAfter($( this ));
    } );
  } );
</script>
</div>
</body>
</html>

works in 1.7 but not in 1.8+

Changed September 09, 2012 04:00AM UTC by mikesherov comment:4

resolution:	invalid
status:	closed → reopened

Changed September 09, 2012 04:02AM UTC by mikesherov comment:5

cc:	→ timmywil, dmethvin
component:	unfiled → traversing
priority:	undecided → high
status:	reopened → open

Confirmed works as expected in jQuery 1.7.2 and broken in 1.8.0 and later. Looks like a problem with :nth-child selector and .children() : http://jsbin.com/izaler/2/edit

Changed November 22, 2012 03:34PM UTC by dmethvin comment:6

Can someone give a specific description of what is wrong with this demo? I am running it on both -1.7.2 and -git but not seeing any difference in the result. It always breaks the column on the 13th element, "Ahlheim , Klaus".

Changed November 22, 2012 03:36PM UTC by jannis.hell@adesso.de comment:7

yes, do it more than once, you'll see the difference between .7 and .8 then

Changed November 22, 2012 03:43PM UTC by jannis.hell@adesso.de comment:8

seems to be fixed in the git version. In the jquery-1.8.1.min version it was wrong

Changed November 22, 2012 05:29PM UTC by dmethvin comment:9

resolution:	→ fixed
status:	open → closed

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#12281 closed bug (fixed)