Callback for expand node.
If you set 'setting.callback.beforeExpand',and return false, zTree will not expand node, and will not trigger the 'onExpand' callback.
Default: null
event Object
zTree unique identifier: treeId.
JSON data object of the node to be expanded
function myOnExpand(event, treeId, treeNode) {
alert(treeNode.tId + ", " + treeNode.name);
};
var setting = {
callback: {
onExpand: myOnExpand
}
};
......