# Recursive treeList
**URL:** https://discourse.nodered.org/t/recursive-treelist/59543
**Category:** Developing Nodes
**Created:** [8 March 2022 15:48 UTC](https://discourse.nodered.org/t/recursive-treelist/59543 "2022-03-08T15:48:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@cloud-rocket](https://discourse.nodered.org/u/cloud-rocket)
#### Post date: [8 March 2022 15:48 UTC](https://discourse.nodered.org/t/recursive-treelist/59543/1 "2022-03-08T15:48:30Z")
I'd like to use [treeList widget](https://nodered.org/docs/api/ui/treeList/) to allow a user to select nodes from a huge data tree (file system). A specific node content can be loaded dynamically using `$.getJSON` with a "path" argument.
I noticed that treeList supports this dynamic approach by passing the getJSON function as an argument for `children`. Yet am not sure how to accomplish it recursively.
Help appreciated!
Thanks
---
### Author:  [@cloud-rocket](https://discourse.nodered.org/u/cloud-rocket)
#### Post date: [8 March 2022 18:26 UTC](https://discourse.nodered.org/t/recursive-treelist/59543/2 "2022-03-08T18:26:31Z")
Ok, found an answer on my own - there is an undocumented second argument `item` to the children function:
```auto
children: function(done, item) {
$.getJSON('/some/url', function(result) {
done(result);
})
}
```
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [7 May 2022 18:26 UTC](https://discourse.nodered.org/t/recursive-treelist/59543/3 "2022-05-07T18:26:54Z")
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