Feature: #88791 - Introduce PreviewAspect in Context¶
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).
The Context API has a new Aspect called "frontend.preview". It can be used to determine whether the frontend is currently in preview mode.
This Aspect replaces the now deprecated property
TypoScriptFrontendController->fePreview. Accessing this property
triggers a PHP
E_USER_DEPRECATED error, and fetches the information from the new Context Aspect instead.