title: How can I remove triangle icon (for expansion/collapse) for root node not having child node?
body: <p>I am facing some difficulty with ui of jstree which would dynamically add/remove nodes when clicked on the node. It would add child nodes on first click and remove click nodes on second click on the same node. I am currently binding the jstree with selected_node event like this :</p>
  
  <pre><code>$(function () {
      $("#tree").jstree({ 
          "json_data" : {
              "data" : [
                  { 
                      data : "/", 
                      attr : { "id" : "root"},
                      state : "closed",
                  },
              ]
          },
          "plugins" : [ "themes", "json_data", "crrm", "ui" ]
      }).bind("select_node.jstree", function(event, data) { 
          // . . . 
      }
  </code></pre>
  
  <p>Initially a node with folder icon with a small triangle on left side (for expansion) and the data value on the right side of folder icon. As there are no nodes of the tree initially I do not want the expansion feature i.e. the small triangle on left side. Can anybody help with that ? For child nodes when I click for the second time(that removes child nodes of child node) the triangle disappears. I am not able to understand the logic behind random display of triangle for expansion/collapse. </p>