--- a/libervia/web/pages/_browser/template.py	Thu Jun 22 16:36:01 2023 +0200
+++ b/libervia/web/pages/_browser/template.py	Thu Jun 22 16:36:18 2023 +0200
@@ -130,6 +130,24 @@
 env.addFilter("tojson", _tojson)
 
 
+def _media_type_main(value: str|None) -> str|None:
+    """Return main type of a media type"""
+    if not value:
+        return None
+    return value.partition("/")[0]
+
+env.addFilter("media_type_main", _media_type_main)
+
+
+def _media_type_sub(value: str|None) -> str|None:
+    """Return main type of a media type"""
+    if not value:
+        return None
+    return value.partition("/")[1]
+
+env.addFilter("media_type_sub", _media_type_sub)
+
+
 def _icon_use(name, cls=""):
     kwargs = cls.to_dict()
     cls = kwargs.get('cls')