.. include:: /Includes.rst.txt .. _breaking-52877: ======================================== Breaking: #52877 - Remove ExtJS Viewport ======================================== See :issue:`52877` Description =========== The ExtJS component `TYPO3.Viewport` has been removed from the TYPO3 Core, `Ext.layout` and `Ext.Viewport` are no longer used in the backend viewport. Impact ====== - Calling the removed ExtJS components `TYPO3.Viewport` or `TYPO3.backendContentIframePanel` will result in an error - The ability to stack content with cards with `TYPO3.Viewport.ContentCards` is no longer supported Affected Installations ====================== Any TYPO3 installations using custom extensions based on ExtJS which rely on the above mentioned components. Migration ========= There is no migration available. .. index:: Backend, JavaScript