communicate with console error if it fails

src/Umbraco.Web.UI.Client/src/packages/core/validation/controllers/validation.controller.ts

@@ -131,6 +131,11 @@ export class UmbValidationController extends UmbControllerBase implements UmbVal
 					this.#parentMessages = msgs;
 					msgs.forEach((msg) => {
 						const path = ReplaceStartOfPath(msg.path, this.#baseDataPath!, '$');
+						if (path === undefined) {
+							throw new Error(
+								'Path was not transformed correctly and can therefor not be transfered to the local validation context messages.',
+							);
+						}
 						// Notice, the local message uses the same key. [NL]
 						this.messages.addMessage(msg.type, path, msg.body, msg.key);
 					});
@@ -152,6 +157,11 @@ export class UmbValidationController extends UmbControllerBase implements UmbVal
 					msgs.forEach((msg) => {
 						// replace this.#baseDataPath (if it starts with it) with $ in the path, so it becomes relative to the parent context
 						const path = ReplaceStartOfPath(msg.path, '$', this.#baseDataPath!);
+						if (path === undefined) {
+							throw new Error(
+								'Path was not transformed correctly and can therefor not be synced with parent messages.',
+							);
+						}
 						// Notice, the parent message uses the same key. [NL]
 						this.#parent!.messages.addMessage(msg.type, path, msg.body, msg.key);
 					});

src/Umbraco.Web.UI.Client/src/packages/core/validation/utils/replace-start-of-path.function.ts

@@ -5,10 +5,10 @@
  * @param startTo {string}
  * @returns {string}
  */
-export function ReplaceStartOfPath(path: string, startFrom: string, startTo: string): string {
+export function ReplaceStartOfPath(path: string, startFrom: string, startTo: string): string | undefined {
 	// if the path conitnues with a . or [ aftr startFrom, then replace it with startTo, otherwise if identical then it is also a match. [NL]
 	if (path.startsWith(startFrom + '.') || path === startFrom) {
 		return startTo + path.slice(startFrom.length);
 	}
-	return path;
+	return;
 }