TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
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+.. include:: /Includes.rst.txt
+
+.. _breaking-61471:
+
+=====================================================
+Breaking: #61471 - EXT:t3skin CSS files moved to less
+=====================================================
+
+See :issue:`61471`
+
+Description
+===========
+
+All CSS files in EXT:t3skin are moved to less files and handled by less CSS pre processor
+and merged to a single CSS file.
+
+
+Impact
+======
+
+Single CSS files can not be included anymore. This may result in broken layouts.
+
+
+Affected installations
+======================
+
+A TYPO3 instance is affected if an extension loads single CSS files from EXT:t3skin. Backend modules of
+extensions usually get CSS core stuff loaded by default, which will not be a problem. An extension is
+only affected if single CSS files are explicitly referenced. This should be a rare case.
+
+
+Migration
+=========
+
+Most simple solution is to copy over the "old" CSS file from an older instance. Directly including those
+files from t3skin is discouraged. A better solution is to refactor the extension to use the full t3skin
+CSS file and to overlay it with required changes in an own file.
+
+
+.. index:: PHP-API, Backend, ext:t3skin