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    <p>I had a similar problem a couple of weeks ago. I had a function call in the "url" field, which ultimately led to java code that made a JSON string based on a SQL query. So when I clicked on a childless closed node, the function was called again, resulting in an endless tree.</p> <p>the way I solved this was:</p> <pre><code>"json_data" : { "ajax" : { "url" : "getAreaTree?treeType=Areas&amp;ownerPhone=&lt;%=webSessionObject.getUserPhoneNum()%&gt;", "data" : function (n) { return { id : n.attr ? n.attr("id") : 0 }; } } }, </code></pre> <p>The result of the function defined in "data" will be added as a parameter to the "url" function. Then I can check whether the parameter was 0 (initial load) or 1 (the id of my root) or something else.</p> <p>If this doesn't work for you, maybe you could try something like this:</p> <pre><code>.bind("before.jstree",function(event,data){ if(data.func === "create"){ var foo = true; data.inst._get_node(null, true).each(function () { if(this.id!=rootId &amp;&amp; this.id!=0){ foo = false; }) if(!foo){ event.stopImmediatePropagation(); return false; } } }) </code></pre> <p>I'm not exactly sure this works though. "before.jstree" fires before all events. I'm checking whether the function about to fire is "create", and if it is I check the id of the selected node. If it's something else than my root's id or 0 (initial load) I stop the create function.</p> <p>I use a similar structure for a different situation, so something like this should work. It could be that the "create" event is not what you should be binding to though. You can change it to</p> <pre><code>.bind("before.jstree",function(event,data){ console.log(data.func) if(data.func === "create"){ </code></pre> <p>To see which functions are called.</p>
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    1. POHow do I get rid of recursive AJAX requests for a childless node?
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    1. COIn my initial answer I had "loaded" as the binded event. I edited it to "create", but don't be confused if somewhere in my post I still talk about "loaded" - it's just lazy editing.
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    2. COYour first suggestion with specifying a callback function that adds some data to the GET-request does not work for me: 'cause I ask a server for a file (*.json) directly without any request processing and adding any "arguments" to the URL is pointless in my case...
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      1. USJohn Doe
    3. COI thought so, but I posted it since I thought it could help somehow. Did you try the "before" trick? Honestly, this feature of jstree is really annoying, and I'm not aware of any easy way around it.
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