---
title: "Breaking: #52877 - Remove ExtJS Viewport"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-52877"
source: "Changelog/8.4/Breaking-52877-RemoveExtJSViewport.rst"
modified: "2026-09-14T09:47:36+00:00"
---

# Breaking: #52877 - Remove ExtJS Viewport

See [forge#52877](https://forge.typo3.org/issues/52877)

## Description

The ExtJS component `TYPO3.Viewport` has been removed from the TYPO3 Core, `Ext.layout` and `Ext.Viewport` are no longer
used in the backend viewport.

## Impact

-   Calling the removed ExtJS components `TYPO3.Viewport` or `TYPO3.backendContentIframePanel` will result in an error
-   The ability to stack content with cards with `TYPO3.Viewport.ContentCards` is no longer supported

## Affected Installations

Any TYPO3 installations using custom extensions based on ExtJS which rely on the above mentioned components.

## Migration

There is no migration available.