I haven’t developed in SharePoint for a while and trying to gain some knowledge on how to create a interactive SharePoint Online page - either classic or modern.
The requirement is to display/edit a simple page with some items from lists/libraries. So I thought of a web part page. Once solution is created, I want to template solution and re-create another site(s).
The solution needs to limit certain lists / libraries to 1-3 items. i.e. a user can only create one item in a certain list otherwise a warning is displayed.
Is there a simple way to achieve my requirement without building a full SPFx solution I was thinking if the bulk of the work can be done in the UI and maybe add a widget validation script?