Render custom canonical tag

web/typo3conf/ext/ep_theme/Configuration/TypoScript/Page/Main.ts

@@ -1,3 +1,10 @@
+tmp.canonical = TEXT
+tmp.canonical {
+    typolink.parameter.data = TSFE:id
+    typolink.returnLast = url
+    wrap = <link rel="canonical" href="{$plugin.tx_eptheme.settings.canonicalBaseUrl}|"/>
+}
+
 page = PAGE
 page {
     meta {
@@ -139,6 +146,9 @@ page {
         </script>
     )
     headerData.999.stdWrap.if.isTrue = {$plugin.tx_eptheme.settings.googleTagManagerId}
+
+    headerData.100 < tmp.canonical
+    headerData.100.insertData = 1
 }
 
 [applicationContext = Development]

web/typo3conf/ext/ep_theme/Configuration/TypoScript/constants.txt

@@ -106,6 +106,8 @@ plugin.tx_eptheme {
 		googleMapsJsApiUrl = https://maps.googleapis.com/maps/api/js?key=AIzaSyDDOforD1O_j4xXy2nJybC2yQqbUAw9ClY
 		# cat=eptheme/300/120; type=string; label=Google Maps Js API Url
 		googleMapsApiKey = AIzaSyDDOforD1O_j4xXy2nJybC2yQqbUAw9ClY
+		# cat=eptheme/300/130; type=string; label=Canonical base URL/Domain
+		canonicalBaseUrl = https://www.ep-reisen.de
 
 		# cat=eptheme.events/700/100; type=string; label=Event date day from
 		eventDateDayFrom =