TYPO3 Icons
Register Icons BEFORE 11nice example in ext_localconf.php: https://github.com/benjaminkott/bootstrap_package/blob/master/ext_localconf.php Icon API changes in TYPO3 11 using Configuration/Icons.phphttps://usetypo3.com/icon-api.html TYPO3 Iconshttps://typo3.github.io/TYPO3.Icons/index.html Plugin Iconhttps://docs.typo3.org/m/typo3/book-extbasefluid/main/en-us/4-FirstExtension/7-configuring-the-plugin.html?highlight=icon#registering-the-plugin Icon APIhttps://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Icon/Index.html