diff --git a/templates/writeBadge.html b/templates/writeBadge.html
index c22a608..ea6fe30 100644
--- a/templates/writeBadge.html
+++ b/templates/writeBadge.html
@@ -25,28 +25,23 @@
 </html>
 <script>
 if ({{nbBadge}} >= 1) {
-    var xhr = new XMLHttpRequest();
-    xhr.open('GET', '/copyBadge/{{uid}}', true);
-
-    xhr.onload = function() {
-        var jsonreponse = JSON.parse(xhr.response);
-        if (jsonreponse.status == "OK") {
-            //console.log("Badge cloné")
-            if ({{nbBadge-1}} == 0 ){
-              window.location.href = "/wait?raison=Tous%20les%20badges%20sont%20copi%C3%A9s%20%21&redirect=/";
+    fetch(`/copyBadge/{{uid}}`)
+    .then(response => response.json())
+    .then(jsonresponse => {
+        if (jsonresponse.status == "OK") {
+            if ({{nbBadge-1}} == 0) {
+                window.location.href = "/wait?raison=Tous%20les%20badges%20sont%20copi%C3%A9s%20%21&redirect=/";
+            } else {
+                window.location.href = `/wait?raison=Badge%20clon%C3%A9%20%21%20Appuyer%20sur%20le%20bouton%20pour%20passer%20au%20badge%20suivant.&redirect=/writeBadge/{{nbBadge-1}}/{{uid}}`;
             }
-            else{
-            window.location.href = "/wait?raison=Badge%20clon%C3%A9%20%21%20Appuyer%20sur%20le%20bouton%20pour%20passer%20au%20badge%20suivant.&redirect=/writeBadge/{{nbBadge-1}}/{{uid}}";
-          }
         } else {
-            window.location.href = "/writeBadge/{{nbBadge}}/{{uid}}" + "?error=" + jsonreponse.message;
+            throw new Error(jsonresponse.message);
         }
-
-    };
-
-    xhr.send(null);
-
+    })
+    .catch(error => {
+        window.location.href = `/writeBadge/{{nbBadge}}/{{uid}}?error=${error.message}`;
+    });
 } else {
-    window.location.href = "/"
+    window.location.href = "/";
 }
 </script>