TelerikDropDownButton — invalid aria-controls attribute

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Unplanned

Last Updated: 25 Mar 2026 13:06 by ADMIN

Scheduled for 2026 Q2

Jeremi

Created on: 09 Mar 2026 15:39

Category: UI for Blazor

Type: Bug Report

TelerikDropDownButton — invalid aria-controls attribute

Description

When the dropdown is open, the button's aria-controls attribute references a value that matches the popup's data-id, not its actual id. Since aria-controls must point to an element's id, the attribute is invalid and no element in the DOM matches the reference, breaking the accessible relationship between the button and its popup.

Button renders:

aria-controls="50dc5df2-b83e-41bd-8c34-98470aba77c6"

Popup element has:

data-id="50dc5df2-b83e-41bd-8c34-98470aba77c6"
id="8630d4e4-2f22-4eaf-b96c-7cae113b70ed"

Steps to Reproduce

Add a TelerikDropDownButton using the standard Telerik example (source below).
Open the dropdown and inspect the HTML or run a Lighthouse audit.

<TelerikDropDownButton Icon="@SvgIcon.Share" OnClick="@(()=>OnItemClick("Primary"))">
    <DropDownButtonContent>Share</DropDownButtonContent>
    <DropDownButtonItems>
        <DropDownButtonItem Icon="@SvgIcon.Facebook" OnClick="@(()=>OnItemClick("Facebook"))">Facebook</DropDownButtonItem>
        <DropDownButtonItem Icon="@SvgIcon.Twitter" OnClick="@(()=>OnItemClick("Twitter"))">Twitter</DropDownButtonItem>
        <DropDownButtonItem Icon="@SvgIcon.Linkedin" OnClick="@(()=>OnItemClick("Linkedin"))">Linkedin</DropDownButtonItem>
        <DropDownButtonItem Icon="@SvgIcon.Reddit" OnClick="@(()=>OnItemClick("Reddit"))">Reddit</DropDownButtonItem>
    </DropDownButtonItems>
</TelerikDropDownButton>

Attached Files:

dropdownbutton.png

2 comments

ADMIN

Ivan Danchev

Posted on: 18 Mar 2026 15:11

Jeremi,

We've logged the issue in our Backlog for fixing.

Thank you for reporting it. I've updated your Telerik points.

Regards,
Ivan Danchev
Progress Telerik

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ADMIN

Ivan Danchev

Posted on: 16 Mar 2026 13:19

Hello Jeremi,

Thank you for contacting us about the DropDownButton's aria-controls attribute. I can confirm that even in the latest official version its value matches the popup's data-id attribute value.

I've requested more information from our accessibility experts on why we use data-id instead of id, and whether this should be logged for fixing. I'll post back here, as soon as I have something more to share.

Regards,
Ivan Danchev
Progress Telerik

Love the Telerik and Kendo UI products and believe more people should try them? Invite a fellow developer to become a Progress customer and each of you can get a $50 Amazon gift voucher.