Window loses focus on the initial 'Shift + Tab' press when the window is first opened

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Completed

Last Updated: 09 Jul 2025 14:37 by Alexander

Release 2025 Q1 (Feb)

Alexander

Created on: 02 Sep 2024 09:42

Category: Window

Type: Bug Report

Window loses focus on the initial 'Shift + Tab' press when the window is first opened

Pressing Shift+Tab initially when the Window is opened, moves the focus from the Window back to the Button that opens it.

Steps To Reproduce:

Open REPL repro
Click "Open Modal" Button
Press "Shift+Tab"

5 comments

Alexander

Posted on: 09 Jul 2025 14:37

Hi Hristian,

I did not know it is possible to set the version in the REPL, so I learned something new today. Thanks.

Regards,
Alex

ADMIN

Hristian Stefanov

Posted on: 09 Jul 2025 14:31

Hi Alex,

I can confirm that the bug has been fixed. When testing in the REPL, please ensure you update the environment to the latest version from the left-hand menu. Here’s the updated link: REPL link.

Regards,
Hristian Stefanov
Progress Telerik

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Alexander

Posted on: 04 Jul 2025 14:07

Hello Telerik team,

I was wondering if this has been fixed. The status of this item is "Completed", "Release 2025 Q1 (Feb)" is specified. Since this is in the past, it should now no longer be possible to break out of the focus trap of a modal window, right? When I open the REPL from the initial post, however, nothing seems to have changed, I can still move the focus to the button in the background using "Shift + Tab".

Regards,
Alex

ADMIN

Hristian Stefanov

Posted on: 02 Sep 2024 14:56

Hi Alexander,

Thank you for sharing your workaround. This will be valuable for other developers encountering the same scenario.

Regards,
Hristian Stefanov
Progress Telerik

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Alexander

Posted on: 02 Sep 2024 09:54

For anybody also encountering this, here is our workaround:

   document.addEventListener("keydown", (event) => {
      if (!event.shiftKey || event.key !== "Tab") {
         return;
      }
      if (!(event.target instanceof HTMLElement)) {
         return;
      }
      if (!event.target.classList.contains("k-window")) {
         // only prevent "Shift+Tab" on the Telerik window itself
         return;
      }
      const modal = event.target.ariaModal === "true";
      if (modal) {
         // only prevent "Shift+Tab" on modal windows
         event.preventDefault();
      }
   });