---
title: "Deprecation: #65578 - config.concatenateJsAndCss and concatenateFiles"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-65578"
source: "Changelog/9.4/Deprecation-65578-ConfigconcatenateJsAndCssAndConcatenateFiles.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Deprecation: #65578 - config.concatenateJsAndCss and concatenateFiles

See [forge#65578](https://forge.typo3.org/issues/65578)

## Description

The TypoScript property `config.concatenateJsAndCss` and the related methods within `PageRenderer` have
been marked as deprecated:

-   `PageRenderer->getConcatenateFiles()`
-   `PageRenderer->enableConcatenateFiles()`
-   `PageRenderer->disableConcatenateFiles()`

## Impact

Setting the TypoScript property or calling one of the methods above will trigger a PHP `E_USER_DEPRECATED` error.

## Affected Installations

TYPO3 installations setting the TypoScript property or calling one of the PHP methods directly.

## Migration

Use the TypoScript properties `config.concatenateJs` and `config.concatenateCss`
and the corresponding methods in PageRenderer class directly.