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Nov 11, 2025
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docs: add breaking changes for version 12 #3340

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3b08492
docs: add breaking changes for version 12
IvanDanchev Nov 11, 2025
4982688
docs: reword the new changes
IvanDanchev Nov 11, 2025
2dc49f2
docs: add api links
IvanDanchev Nov 11, 2025
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25 changes: 25 additions & 0 deletions upgrade/breaking-changes/12-0-0.md
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---
title: 12.0.0
description: Handle the changes in the 12.0.0 release of the Telerik UI for Blazor components.
page_title: Breaking Changes in 12.0.0
slug: changes-in-12-0-0
position: 950
---

# Breaking Changes in 12.0.0

## Chat

The `MessageTemplate` parameter is renamed to `MessageContentTemplate`. `MessageTemplate` is still a valid template, but is used to replace the whole message bubble element.

## Filter

The `TelerikFilter.ValueChanged` event is now deprecated. Use the [`OnUpdate` event](slug:filter-events#onupdate) instead.

## Pager

The `TelerikPager.Adaptive` parameter is now deprecated. Use the [`Responsive` parameter](https://www.telerik.com/blazor-ui/documentation/api/telerik.blazor.components.telerikpager#telerik_blazor_components_telerikpager_responsive) instead. Parameters in setting tags like `GridPagerSettings.Adaptive`, `TreeListPagerSettings.Adaptive`, etc., are renamed to `Responsive`. For example, `GridPagerSettings.Responsive`.

## ToolBar

The `TelerikToolBar.Adaptive` parameter is now deprecated. Use the [`OverflowMode` parameter](https://www.telerik.com/blazor-ui/documentation/api/telerik.blazor.components.teleriktoolbar#telerik_blazor_components_teleriktoolbar_overflowmode) instead.
1 change: 1 addition & 0 deletions upgrade/breaking-changes/list.md
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# List of Telerik UI for Blazor Versions with Breaking Changes

This article lists the releases of the Telerik UI for Blazor product that introduce breaking changes. You may want to go through it when [upgrading](slug:upgrade-tutorial) to see whether you are affected.
* [12.0.0](slug:changes-in-12-0-0)
* [10.0.0](slug:changes-in-10-0-0)
* [9.0.0](slug:changes-in-9-0-0)
* [8.0.0](slug:changes-in-8-0-0)
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