slideToggle() doesn't push elements created with jquery append() down

Question

I do have a problem using slideToggle(). The following DOM elements won't be pushed down, they just overlap. I tried a lot of versions. I do create the tags with jquery getting a JSON from which I fill in the tag content, so I iterate over the JSON to create the HTML tags for each element :

var project_infos = '';   
jQuery(document).ready(function(){
$.getJSON('project.json', function(data){    
   project_infos += '<div class=\"row\">'    
   + '<div class=\"span3\">'
   + '<div class=\"well\">'
   + '<div>'
   +'<ul class=\"nav nav-list sidebar-list\">';

   for( var i = 0; i < data.length; i ++ ) {
      var project_name         = data[i]["item"]; 

      project_infos += '<li>'
      +'<label class=\"tree-toggler nav-header\">'
      +'<i class=\"fa fa-arrow-right\"></i>' + project_name + '</label>'
      +'<ul class=\"nav nav-list tree\">'
      +'<li><label class=\"tree-toggler nav-header\">Katalogue</label></li>'
      +'<li>'
      +'<ul class=\"nav nav-list tree\">'
      +'<li><a href="#">Link</a></li>'
      +'<li><a href="#">Link</a></li>'
      +'<li><a href="#">Link</a></li>'
      +'</ul>'
      +'</li>'    
      +'<li><label class=\"tree-toggler nav-header\">History</label></li>'
      +'<li><label class=\"tree-toggler nav-header\">Whole project</label></li>'
      +'</ul>'
      +'</li>';  
      }

      project_infos += '</ul></div></div></div></div>';

      $('#tree').append(project_infos);

      $('.tree-toggler').click(function () {
          $(this).parent().children('ul.tree').slideToggle('slow');
      });
   });
});

EDIT : screenshot of html output. screenshot html output Thanks in advance!

Answer 1

Use find() instead of children()

$(this).parent().find('ul.tree').slideToggle('slow');

children() will only search for first level child elements.