TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
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+.. include:: /Includes.rst.txt
+
+.. _feature-88791:
+
+====================================================
+Feature: #88791 - Introduce PreviewAspect in Context
+====================================================
+
+See :issue:`88791`
+
+Description
+===========
+
+A PreviewAspect for handling the preview flag has been introduced. This aspect may be used to indicate that the
+frontend is in preview mode (for example in case a workspace is previewed or hidden pages or records should be shown).
+
+Impact
+======
+
+The Context API has a new Aspect called "frontend.preview". It can be used to determine whether the frontend is currently in preview mode.
+
+.. code-block:: php
+
+   GeneralUtility::makeInstance(Context::class)->getPropertyFromAspect('frontend.preview', 'isPreview');
+
+This Aspect replaces the now deprecated property :php:`TypoScriptFrontendController->fePreview`. Accessing this property
+triggers a PHP :php:`E_USER_DEPRECATED` error, and fetches the information from the new Context Aspect instead.
+
+.. index:: Frontend, PHP-API, ext:core