Bug report

When the dataSource in the DropDownList is grouped and the user searches for a non-existing value after scrolling, an error is thrown in the browser`s console.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/@NeliKondova/aLuxaViF
2. Scroll the items in the DropDownList
3. try to search for nonexisting value

Current behavior

The following error appears in the browser: kendo.all.js:324317 Uncaught TypeError: Cannot read properties of null (reading 'offsetTop')

Expected/desired behavior

There should be no error when searching for non-existing value is performed.

Environment

• Kendo UI version: 2023.3.1114
• Browser: [all ]

Bug report

When remote data is loaded in the DropDownList and the loading icon appears while loading, the down arrow icon remains visible. Thus, both icons are overlapping.

Reproduction of the problem

1. Open the Dojo
   Note: if the data loads fast and the issue does not occur, open the browser developer tools in order to hit the debugger in the requestEnd event handler

Current behavior

Both - the loading indicator and the down arrow icon appear at the same time:

Expected/desired behavior

The down arrow icon should disappear while the loading indicator is displayed.

The issue is a regression starting with the 2023 R2 (2023.2.606) version

Environment

• Kendo UI version: 2023.3.1010
• Browser: [all]

See Dojos. When setting the "filter" property with setOptions, the search box does not appear anymore.

Regression after 2023.1.425 (tested with 2023.2.718)

Before:

https://dojo.telerik.com/iwiyOkac

After:

https://dojo.telerik.com/UrOHuBeD

Bug report

The DropDownList does not change its popup height when items added/removed from its source.

This is a regression introduced with 2023.1.314 release.

Reproduction of the problem

• Run the following Dojo: https://dojo.telerik.com/aCoHAZuK/4
• Add new item to the list
• Open the popup again - a vertical scroll will be present, while the popup should be resized to display all the three items

Expected/desired behavior

The popup height should change according to the new number of items.

Environment

• Kendo UI version: 2023.1.425
• Browser: [all]

Bug report

List height not properly adjusted in Cascading DropDownList since 2023.1.314

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

1. Select Parent 2 from Parent DDL

2. Open Child DDL

3. Select Parent 1 from Parent DDL

4. Open child DDL

Scrollbar appears and not all items visible

Expected/desired behavior
Height shall be adjusted correctly and no scrollbar shall be present

Environment
Kendo UI version:  2023.1.314 or newer
Browser: [all]

Bug report

The Disabled attribute is not applying for the Kendo UI DropDownList.

Reproduction of the problem

Proceed to the following Progress Kendo UI Dojo which demonstrates the behavior.

          <input id="myDropDownList" disabled="disabled" />

Expected/desired behavior

The DropDownList should be disabled as seen in the 2023.1.425 version of Kendo UI for jQuery.

Note

This Disabled Attribute is working as expected for the UI for ASP.NET MVC/Core DropDownList.

@(Html.Kendo().DropDownList()
          .Name("territories")
          .HtmlAttributes(new { disabled = "disabled" })
          //...
)

Environment

• Kendo UI version: 2023.2.606
• jQuery version: All Supported Versions
• Browser: all

Bug report

When the width of the DropDownList is set using the list.width and the DropDownList gets open there is a slight delay of expanding the popup width.

Reproduction of the problem

1. Open the Dojo and open the DropDownList

Current behavior

There is a delay of expanding the popup width.

The issue is a regression starting with 2022 R1 SP1

####Workaround
$('.k-popup').width(600);
Dojo

Expected/desired behavior

There should be no delay when the width od the DropDownlist is set..

Environment

• Kendo UI version: 2022.2.802
• Browser: [all ]

Bug report

The Kendo UI DropDownList's OptionLabel has some padding before the OptionLabel which does not match corresponding items in list.

Reproduction of the problem

Please visit this Progress Kendo UI Dojo and open the Kendo UI DropDownList.

Current behavior

Expected/desired behavior

The OptionLabel should be matching the items below it.

Environment

• Kendo UI version: 2022.1.301
• jQuery version: Supported Versions
• Browser: all

Bug report

When a DropDownList with filtering enabled is used inside a Kendo Window it gets unexpectedly closed when clicked between .k-input-inner and .k-input-value-text elements.

Reproduction of the problem

1. Open the Dojo
2. Open the first DropDownList
3. Then click the second DropDownList to open, but try to click between the red and the green border

Current behavior

The DropDownList is automatically closed

screencast

Expected/desired behavior

The DropDownList should remain opened when clicked

Environment

• Kendo UI version: 2022.2.621
• Browser: [all ]

After updating the version of Kendo we are using to 2022.1.412 we noticed a weird behavior in the DropDownLists. Clicking the drop down arrow once opens the list, then clicking the arrow again closes and re-opens the list instead of just closing it. Note that this does not happen while clicking on any other part of the drop down to close it, selecting an item from the drop down, or clicking outside the drop down list. It only happens while clicking on the arrow button.

Behavior can be seen in the demos on these pages:

https://demos.telerik.com/kendo-ui/dropdownlist/template

https://demos.telerik.com/kendo-ui/dropdownlist/grouping

https://demos.telerik.com/kendo-ui/dropdownlist/cascadingdropdownlist

However the behavior does not appear on these pages:

https://demos.telerik.com/kendo-ui/dropdownlist/virtualization

https://demos.telerik.com/kendo-ui/dropdownlist/serverfiltering

Steps to Reproduce:

• Click the drop down arrow to open the drop down list
• Click on the arrow again and observe the list close and re-open (Note it sometimes doesn't happen right away but takes a few tries)

Bug report

The height of the DropDownList popup is incorrect when using LESS themes.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/@martin.tabakov@progress.com/oMohisUF/2
2. Open the DropDownList

Current behavior

The popup height is incorrect.

Expected/desired behavior

The popup height should be big enough to fit the list.

Environment

• Kendo UI version: 2022.1.119
• Browser: [all]

Bug report

When filtering is performed in the parent widget and an item is selected, duplicate read request are sent to the remote end point for the child widget data.

Reproduction of the problem

1. Open the Dojo
2. In the parent DropDownList search "be" and select "Beverages"

Current behavior

Two requests are sent to the 'Products' DropDownList read end point.

Expected/desired behavior

There should be a single request for reading the widget`s data.

The issue is a regression since 2019 R3 SP1 (2019.3.1023)

Environment

• Kendo UI version: 2021.3.1109
• Browser: [all ]

Bug report

In a virtual DropDownList with a value set, the first item is marked as selected as well. The issue occurs when using jQuery 3.4.1 or later.

Reproduction of the problem

1. Open this Dojo example. - https://dojo.telerik.com/@martin.tabakov@progress.com/UkOmiYEj
2. Open the DropDownList.

Current behavior

Two items are marked as selected.

Expected/desired behavior

Only the item with value 3 should appear as selected.

Environment

• Kendo UI version: 2021.3.914
• **jQuery version: 3.4.1 and later
• Browser: [all]

It will be very nice if the AutoComplete, DropDownList, ComboBox, and MultiSelect components have the floating label functionality like the TextBox widget 

https://dojo.telerik.com/iliKAqUr

1. select "Oranges" from the dropdown
2. press "Change value to 'Bananas'" button
3. press "Sort" button
4. select "Oranges" from the dropdown

Expected: should see two events for "Changed to Oranges" but only see one
Actual: status only shows one value change event from the first selection of "Oranges"

It seems this issue was introduced with the fix for https://github.com/telerik/kendo-ui-core/issues/4496

The introduction of _oldText in the _change method of kendo.list.js has introduced a flaw in the value change detection for DropDownList

The above dojo presents a way to short-circuit the issue since it is not easy to show the _oldText issue since the index check works as a fallback.

In the DropDownList and ComboBox, virtualization only works when the popup is open. In both widgets, item navigation is functional by pressing down to select the next item in the list without opening the popup. However, when the end of the first page of results is reached, the selection goes back to the top of the first page of results instead of loading the second page via virtualization. This misleads the user in that it only presents a portion of the options available. This is also an issue for disabled users and accessibility.

https://demos.telerik.com/kendo-ui/dropdownlist/virtualization

https://demos.telerik.com/kendo-ui/combobox/virtualization

In both examples, holding down without opening the popup will never load more results.

We have had this issue in the past but it is a bigger issue now that we are focusing more on accessibility since users rely more heavily on keyboard navigation.

Hi 

I'm using  lastest version 

demo: https://dojo.telerik.com/eZOPEVeL

In offical demo i found a problem, i don't know that is a issue or any thing.

When i use DropDownList Virtualization, i filter "LILA-Supermercado" then selected a value 10780, then fire change event (that true)

Then, I open and close dropdownlist, does not choose any thing, just open and close, dropdownlist fire change event again (that not true)

this happen with any value which not loading before scroll.

some one help me

Bug report

The change event is being triggered when having an initially selected item in the DropDownList and then open the DropDownList and click on the default selected item. This bug is represented only in MVVM.

Reproduction of the problem

1. Open this Dojo and run it. The three cascading DropDownLists will have default selected items
2. Click on the first DropDownList and select the already selected "Confections" option
3. The other two DropDownLists will be reset because of the change event thrown in the first DropDownList

Current behavior

The change event of a DropDownList with initial data selected is being triggered when clicking on the already selected value.

Expected/desired behavior

Selecting the already selected item of a DropDownList shouldn't trigger its change event because there is no actual change in the component's value. Please check this Dojo for the expected behavior.

Environment

• Kendo UI version: 2019.2.619
• jQuery version: x.y
• Browser: [all]

The "change" event on DropDownList is being triggered when the value change of the widget is via API and not triggered by user interaction.

Steps to reproduce:

https://dojo.telerik.com/oKeBEZUN

1. Manually select a value for category (like Category 4); a console item should be written for user change
2. Click the "change doc to empty" button which clears the category
3. Click the "change doc to values" button which programmatically sets the category

Expected: a log item is NOT added because the change was programmatic and the log item is triggered on "change"
Actual: a log item is added even though the value change was programmatic

The change detection inside the select widget is faulty in that it seems to be effected by focus/blur state.

This issue was found after upgrading kendo UI.  I believe the issue was introduced in 2018.1.117