Reference > Script triggers reference > OnObjectSave
 
OnObjectSave
Performs a script after object data has been validated and saved, but before the field is exited.
When the script runs
After the event has been processed.
Modes in which the trigger can be used
Browse and Find modes.
Result
You can use the Exit Script script step within the triggered script to return True or False.
True: The event that triggered the script proceeds.
False: The event that triggered the script is canceled, but the object is saved and the field that was active before the event that triggered the script remains active.
Compatibility 
 
Where the script trigger is activated 
Supported 
FileMaker Pro 
Yes 
FileMaker Server 
Yes 
FileMaker Go 
Yes 
Custom Web Publishing 
Yes 
FileMaker WebDirect 
Yes 
Runtime solution 
Yes 
Originated in 
FileMaker Pro 10.0
Notes 
This script trigger activates only when the selected field data has been changed.
See Actions that don’t activate script triggers for a list of actions that do not trigger a script.
Related topics 
Setting up script triggers
Setting script triggers for layouts
Setting script triggers for objects