diff --git a/lib/core/src/helpers/event.ts b/lib/core/src/helpers/event.ts
index 090902b58c..088d230a73 100644
--- a/lib/core/src/helpers/event.ts
+++ b/lib/core/src/helpers/event.ts
@@ -13,14 +13,16 @@ declare module 'cash-dom' {
 }
 
 /* Extend as $.Event() to create custom event for cash. */
-$.Event = (event: string, data?: unknown): CashEvent => {
-    const [name, ...namespaces] = event.split('.');
-    const eventObject = new Event(name, {
-        bubbles: true,
-        cancelable: true,
-    });
-    (eventObject as Event & {namespace: string}).namespace = namespaces.join('.');
-    (eventObject as Event & {___ot: string}).___ot = name;
-    (eventObject as Event & {___td: unknown}).___td = data;
-    return eventObject as unknown as CashEvent;
-};
+if (!$.Event) {
+    $.Event = (event: string, data?: unknown): CashEvent => {
+        const [name, ...namespaces] = event.split('.');
+        const eventObject = new Event(name, {
+            bubbles: true,
+            cancelable: true,
+        });
+        (eventObject as Event & {namespace: string}).namespace = namespaces.join('.');
+        (eventObject as Event & {___ot: string}).___ot = name;
+        (eventObject as Event & {___td: unknown}).___td = data;
+        return eventObject as unknown as CashEvent;
+    };
+}