modified code

index.html

@@ -22,12 +22,8 @@
 			} )
 		}
 
-		async function wait_data(){
-			return await this.fetch_data()
-		}
-
 		riot.compile().then(() => {
-			riot.mount('onzer', {items: wait_data()});
+			riot.mount('onzer', {items: fetch_data()});
 		})
 	</script>