jstree jquery how to iterate through all nodes

Question

I'm trying to iterate through every node within a treeview in jstree. The treeview is 4 levels deep but I can't seem to get past the 1st level. The following is the jQuery used to iterate.

$("#myTree").bind('ready.jstree', function (event, data) {
    $('#myTree li').each(function () {
        // Perform logic here
        }
    });
});

Here is a jsfiddle illustrating my point. Please help on how I can iterate through every node in jstree.

Answer 1

This gets all the children of your tree in a flat array for your .each loop.

$("#tree").bind('ready.jstree', function(event, data) {
  var $tree = $(this);
  $($tree.jstree().get_json($tree, {
      flat: true
    }))
    .each(function(index, value) {
      var node = $("#tree").jstree().get_node(this.id);
      var lvl = node.parents.length;
      var idx = index;
      console.log('node index = ' + idx + ' level = ' + lvl);
    });
});

JSFiddle - Docs for get_json

Answer 2

Another way is to open them before trying to access nodes in dom and then close them:

$("#tree").bind('ready.jstree', function (event, data) {
  $(this).jstree().open_all(); // open all nodes so they are visible in dom
    $('#tree li').each(function (index,value) {
        var node = $("#tree").jstree().get_node(this.id);
        var lvl = node.parents.length;
        var idx = index;
        console.log('node index = ' + idx + ' level = ' + lvl);
    });
    $(this).jstree().close_all(); // close all again
});

Answer 3

"Nodes" is an overloaded term. Do you mean the HTML nodes or just the JSON data used to define each node in the jstree? I had a need to iterate through the jstree in order to extract the value for the ID field in each jstree node. If that's all you need, there's a simpler approach:

var v =$("#tree").jstree(true).get_json('#', {'flat': true});
for (i = 0; i < v.length && i < 10; i++) {
    var z = v[i];
    alert("z[id] = " + z["id"]);
}

Answer 4

I wanted a library-way of iterating over the nodes of a jsTree, so I wrote this into the jstree.js file:

each_node: function(callback) {
    if (callback) {
        var id, nodes = this._model.data;
        for (id in nodes) {
            if (nodes.hasOwnProperty(id) /*&& id !== $.jstree.root*/) {
                callback.call(this, nodes[id]);
            }
        }
    }
},

(Note: I'm using jsTree 3.3.4 , and I've inserted the above code on line 3712 right after the get_json function definition.)

In code, I can iterate through the nodes of the tree like this:

$("#myTree").jstree(true).each_node(function (node) {
    // 'this' contains the jsTree reference

    // example usage: hide leaf nodes having a certain data attribute = true
    if (this.is_leaf(node) && node.data[attribute]) {
        this.hide_node(node);
    }
});

Answer 5

var jsonNodes = $('#jstree').jstree(true).get_json('#', { flat: true });
 $.each(jsonNodes, function (i, v) {
     if (true) {
          // Following line will hide the check box on some condition    
          // $("#" + v.id + "_anchor i.jstree-checkbox").toggle(false);
          // it will print the id
           console.log(v.id);
                 }
            });