Remove mounted. Add v-on.

src/common-components/modal/modal.vue

@@ -2,6 +2,7 @@
     <!-- Modal -->
     <div
         class="modal fade modal-component"
+        v-on="{ 'hidden.bs.modal': resetButtonStyle }"
         :id="this.cmsWidgetName"
         tabindex="-1"
         aria-labelledby="ModalComponentLabel"
@@ -61,15 +62,9 @@ export default {
         },
     },
     methods: {
-        setupModalEventListener() {
-            const modal = document.querySelector("#" + this.cmsWidgetName);
-            modal.addEventListener("hidden.bs.modal", (event) => {
-                this.$refs.buttonMain.resetButtonStyle();
-            });
-        },
-    },
-    mounted() {
-        this.setupModalEventListener();
+        resetButtonStyle() {
+            this.$refs.buttonMain.resetButtonStyle();
+        }
     },
     components: {
         buttonMain,