I want to create Ext.tree.TreePanel component and periodically load content from the external URl. So I've written something like

 new Ext.tree.TreePanel({
    	root: {
    		nodeType: 'async',
    		text: 'asdasd',
    		draggable: false,
    		id: 'folders-tree-root'
    	},
    	loader: new Ext.tree.TreeLoader()
});

And now I want to reload this tree, so I write:

tree.loader.dataUrl = 'folders-sample.json';
tree.root.reload();

And nothing happens.

add: The only way I've found is set some invalid value to dataUrl param on TreeLoader creation:

 new Ext.tree.TreePanel({
    	root: {
    		nodeType: 'async',
    		text: 'asdasd',
    		draggable: false,
    		id: 'folders-tree-root'
    	},
    	loader: new Ext.tree.TreeLoader(dataUrl: 'something')
});