From ServiceMax 19.1, FSA has introduced the capability to execute custom JavaScript snippets. This JavaScript snippet is used to retrieve records from the local / client database and execute custom logic on the records. If the snippet is configured for data validation, error is displayed before the data is synced to the server. The snippet code is stored in a salesforce object and downloaded to the client app during configuration sync. This custom code snippet unlike the web services is executed even if the client app is in offline mode (without internet connectivity). For more information on how to create and execute the custom code snippet, see Custom JavaScript snippets.