Define the slots in the Modal.vue

src/Bundle/ChillMainBundle/Resources/public/vuejs/_components/Modal.vue

@@ -52,6 +52,13 @@
 import { trans, MODAL_ACTION_CLOSE } from "translator";
 import { defineProps } from "vue";
 
+defineSlots<{
+  header?: () => any,
+  body?: () => any,
+  footer?: () => any,
+  "body-head"?: () => any,
+}>();
+
 export interface ModalProps {
   modalDialogClass?: string | Record<string, boolean>;
   hideFooter?: boolean;