Post-Text-ItemWhen-Validate-Item

Post-Text-Item
It manipulates an item when Form Builder leaves a text item and navigates to the record level. Fires during the Leave the Item process for a text item. Specifically, this trigger fires when the input focus moves from a text item to any other item.
Use a Post-Text-Item trigger to calculate or change item values. It Fires every time On Failure Navigation fails and focus remains in the text item.
When-Validate-Item
It augments default validation of an item.
Fires during the Validate the Item process. Specifically, it fires as the last part of item validation for items with the New or Changed validation status.
Use a When-Validate-Item trigger to supplement Form Builder default item validation processing.
It is possible to write a When-Validate-Item trigger that changes the value of an item that Form Builder is validating. If validation succeeds, Form Builder marks the changed item as Valid and does not re-validate it. While this behavior is necessary to avoid validation loops, it does make it possible for your application to commit an invalid value to the database. On failure if fired as part of validation initiated by navigation, navigation fails, and the focus remains on the original item.