This one is a bit complex:

1. Run sample at https://dojo.telerik.com/@GaloisGirl/IPAMIHik
2. Enter folder "Documents"
3. Delete "ExcelDocument.xslx" - the operation should fail and the file will come back.
4. Delete "Text.txt" - no request is sent, the file does not come back

Any "delete" operation can be replaced by a "rename" operation, and the result is the same.

The problem does not happen at root level. I don't know if it's because it's the root levels, or because the elements are directories.

Bug report

When a node in the TreeView of a Kendo UI FileManager is selected, then the parent node is collapsed, and re-expanded, the selection is removed.

Reproduction of the problem

1. Go to the following Progress Kendo UI Dojo.
2. Expand the Root node
3. Select Folder Inner 1
4. Collapse Root
5. Re-expand Root

Current behavior

The selected node within a parent after collapsing and expanding will lose its selection. Here is a screencast of the above in action.

Expected/desired behavior

The selection should persist even upon expanding/collapsing parent nodes.

Environment

• Kendo UI version: 2021.2.616

The views.tree option is undocumented on https://docs.telerik.com/kendo-ui/api/javascript/ui/filemanager/configuration/views.tree

The example fails with error:

Error: Error! The requested URL returned 0 - error at line 114

It's also unclear whether "tree" is a 3rd view in parallel to "list" and "grid" as the drop-down on https://demos.telerik.com/kendo-ui/filemanager/api would suggest (and if that is the case, how to enable this as an option in the toolbar) or whether it relates to the treeView of folders on the side.

Creating a new folder

1. Run sample at https://dojo.telerik.com/@GaloisGirl/EpuYiJOt   (cloned from https://demos.telerik.com/kendo-ui/filemanager/api , but there's no back-end error there )
2. Add new folder
3. Backend returns error (because the relative URLs throw a 404 error there)
   
4. Result:
   1. Actual: a new folder is seen in the right pane (regardless if list or grid) but not in the TreeView in the left pane
   2. Expected: state should be consistent between both panes.
      

Deleting a folder

Fails silently. The folder disappears from both views.

Renaming a folder

The renamed folder is shown as renamed in the TreeView, but the ListView or GridView hangs.

If I'm doing something wrong, an example of proper back-end error handling would be helpful.

Bug report

Reproduction of the problem

Dojo example.

1. Open the browser dev tools console.
2. Expand "Folder" in the treeview.
3. Click "Folder2" in the treeview.
4. Click "Folder" in the breadcrumb

Current behavior

The following js exception is thrown: VM187678 kendo.all.min.js:114 Uncaught TypeError: Cannot read property 'loaded' of undefined

Expected/desired behavior

Navigation occurs without an exception.

Environment

• Kendo UI version: 2020.1.114
• jQuery version: x.y
• Browser: [all]

Run sample at https://dojo.telerik.com/@GaloisGirl/axacOhOC and click "New Folder".

• Actual result: SyntaxError: missing ) in parenthetical
• Expected result: a new folder appears