Creating format specific fields that are mandatory

[Filip Miskic]

Is there a way to do this? For example if I have a serial number that I know is 8 characters and someone needs to enter it. If they put nothing or anything but 8 characters in length it won't let you submit the screen. Then if this is possible can it be attached to a specific field. For example if field one is selected then the required field will need 8 characters. if field two is selected the required field will need 5 characters and so forth. 

[Alexey Matveev]

Hello,

If you are on Jira Server/ Data Center you can use Adaptivist Scriptrunner behaviours

https://scriptrunner.adaptavist.com/5.2.4/jira/behaviours-overview.html