---
title: "Breaking: #110027 - StandardContentPreviewRenderer streamlined"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-110027-1781042985"
source: "Changelog/15.0/Breaking-110027-StandardContentPreviewRendererStreamlined.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Breaking: #110027 - StandardContentPreviewRenderer streamlined

See [forge#110027](https://forge.typo3.org/issues/110027)

## Description

`\TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer` has been turned
into a stateless, dependency-injected service. It is now declared `final`
and can no longer be subclassed. The lazy `initialize()` workaround that
resolved its dependencies through
`\TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance()` on first use has
been removed, and all dependencies are passed through the constructor instead.

## Impact

Custom preview renderers extending
`\TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer` raise a fatal
error, as the class is now `final`.

## Affected installations

Instances with third-party extensions that subclass
`StandardContentPreviewRenderer` or instantiate it manually.

## Migration

Instead of subclassing `StandardContentPreviewRenderer`, implement
`\TYPO3\CMS\Backend\Preview\PreviewRendererInterface` directly. The standard
renderer may be composed and its rendering methods delegated to where its output
is desired, as `\TYPO3\CMS\Form\Preview\FormPagePreviewRenderer` demonstrates.