Breaking: #91563 - PHP-based JS + CSS inclusions for Frontend removed

See Issue #91563

Description

In the past, TYPO3’s “TSFE” object allowed to manually add CSS or JavaScript snippets via PHP code via the following method and properties:

  • TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->setJS()
  • TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->additionalJavaScript
  • TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->additionalCSS
  • TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->JSCode
  • TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController->inlineJS

These have been removed due to better APIs like PageRenderer (available since TYPO3 v4.5) and AssetCollector (TYPO3 v10).

Impact

Accessing the method and properties will have no effect and trigger a PHP notice.

Affected Installations

TYPO3 installations with custom extensions using this functionality directly to inject custom CSS or JavaScript.

Migration

Use the AssetCollector API in PHP to add JavaScript and CSS code or use files directly.