D8

The Dialog Component has an extremely rich set of features for validating data in the dialog. Validation rules can be defined declaratively, or by using code (either Javascript for client-side or Xbasic for server-side). Validation rules are evaluated on the client where possible (thus eliminating the need for an Ajax callback). Validation rules can be set to fire when the dialog is submitted, or immediately when the user tabs out of a field. These videos discuss the various validation options in the Dialog Component.