modified code

index.html

@@ -16,16 +16,18 @@
 	<script type="javascript" src="./onzer.riot"></script>
 
 	<script type="text/javascript">
-		async function fetch_data(){
+		function fetch_data(){
 			return fetch("https://dwarves.iut-fbleau.fr/~fauvet/api/albums").then(response => {
 				return response.json();
 			} )
 		}
 
-		riot.compile().then(() => {
+		async function wait_data(){
-			riot.mount('onzer', {
+			return await this.fetch_data()
-				items : await fetch_data()
 		}
+
+		riot.compile().then(() => {
+			riot.mount('onzer', {items: wait_data()}
 			);
 		})
 	</script>

onzer.riot

@@ -32,6 +32,7 @@
             onBeforeMount(props){
                 this.state = {
                     placeholder: "Rechercher dans les albums",
+                    items: props.results,
                     search: "albums"
                 };
                 this.paintButton();