Extension for Jira Service Desk app is available on Cloud hosting. It provides additional features for the Customer Portal.
Default Request Type configuration in Jira Service Desk does not provide any additional options that dynamically hide or display fields on the Customer Portal. You are able only to create request types, define their fields and build request type’s groups. Extension for Jira Service Desk provides additional Dynamic Forms feature.
Dynamic Forms allows to configure conditions and validators for fields defined in the specific Request type. You can decide which field is required, so that request can’t be created if field is left empty or incomplete. By configuring conditions, you can determine when the field appears.