diff --git a/src/index.ts b/src/index.ts
index 2713e30..f013c99 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -697,9 +697,11 @@ export class ValidationService {
      * @param success The validation result.
      * @param submitEvent The `SubmitEvent`.
      */
-    handleValidated = (form: HTMLFormElement, success: boolean, submitEvent: SubmitEvent) => {
+    handleValidated = (form: HTMLFormElement, success: boolean, submitEvent?: SubmitEvent) => {
         if (success) {
-            this.submitValidForm(form, submitEvent);
+            if (submitEvent) {
+                this.submitValidForm(form, submitEvent);
+            }
         }
         else {
             this.focusFirstInvalid(form);