Roderick reacted to LittleMsGinger in onsubmit not working
You can use FormSubmitted event handler. I saw it in the howto article: https://howto.caspio.com/datapages/ajax-loading/
Roderick reacted to AtayBalunbalunan in 2 Datapages and 1 Webpage (Passing Parameters)
Assuming your DataPage A is a submission form, this is possible if you enable the On exit: Pass field value as parameter.
Upon submission, your Single Record Update form will capture this parameter if you have this.
Just ensure that AJAX is enabled for both DataPages. https://howto.caspio.com/datapages/ajax-loading/