Been following Kelly Morrow's blog on Arcade expressions but need help writing a statement that would produce a pop up to enter a value in a field if another field is or is not populated. For example if a field for a measurement is left blank then there must be a reason that needs to be captured in another field which is in the Collector app. Also, if there is a certain value entered in a field, then a pop up would appear that instructs the user that another field must be filled in. Is this possible? I have some experience with coding but need a refresher. See screen shot of attributes attachment.
