I am trying to include a feature in my app that examines the values of a column in a user-uploaded Google sheet and verifies whether they are correct or not. If there are any incorrect values, a popup like Snackbar or Notification dialog will appear listing the incorrect values. If there are no incorrect values, no popup will appear. How do you display a popup with different values depending on the situation? Is there a way to display unique popups directly from the ServerScript without having to create separate pages? Thank you very much!
You can do it either by direct interaction with Snackbar's children widgets or by binding them to Custom Properties:
// option 1
app.popups.Snackbar.descendants.SnackbarText.text = message;
// option 2
app.popups.Snackbar.properties.Text = message;
app.popups.Snackbar.visible = true;
You can see first option implementation sample here - https://developers.google.com/appmaker/samples/jdbc/