Bug report

When kendo.observable is updated based on a selected TreeView node an error VM6996:1 Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/CESnRsTi
2. Click on the first button
3. Click in the input filed and type some text
4. Press 'Enter' or click otuside the input to blur

Current behavior

An error Uncaught SyntaxError: "undefined" is not valid JSON is thrown.

Expected/desired behavior

There should be no error and the observable should be updated correctly.

The issue is a regression starting with 2024.3.806

Environment

• Kendo UI version: 2024.3.1015
• Browser: [all ]

Bug report

The performance when using the filter method to filter the data in DataSource and Hierarchical datasource is decreased.

Reproduction of the problem

1. Open the following Dojo example and test it with different Kendo versions: - https://dojo.telerik.com/@NeliKondova/UGomaNEX

Current behavior

There is a perfromance decrease when using the filter method with the latest Kendo version:

Expected/desired behavior

The performance of the filter method should be improved.

Environment

• Kendo UI version: 2023.2.829
• Browser: [all]

Bug report

In a DropDownList with local data and virtualization enabled. when the value is set after initialization using the value method, the change event is fired when the component is opened and closed, without actually changing its value.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/@NeliKondova/EmOCUqiq and observe the browser console
2. Open and close the popup without selecting a value.

Current behavior

The change event is fired.

Expected/desired behavior

The change event should not be fired when the value is set through the value method.

Environment

• Kendo UI version: 2023.2.606
• Browser: [all ]

Bug report
Insert on a node's children when using index of 0, аppends item wrongly to PanelBar


Reproduction of the problem
Dojo: https://dojo.telerik.com/iruWAwoy

Click the Insert button to see where the item in the PanelBar goes.

Environment
Kendo UI version: [all]

See DoJo

This calls the DataSource read() method 10 times, but after 10 seconds only 2 of them are resolved (and actually only 2 requests are recorded in dev tools).

This is really annoying when relying on logic in a .then() block, because it is never called in the remaining cases.

Bug report

The dataSource filter configuration only accepts string as value.

Reproduction of the problem

1. Open the Dojo example - https://dojo.telerik.com/@martin.tabakov@progress.com/uVAgAYem
2. Open the MultiSelect.

Current behavior

An error is thrown and the MultiSelect does not open.

Expected/desired behavior

There should be no error and the MultiSelect should open.

Environment

• Kendo UI version: 2021.2.511
• Browser: [all]