Summary field how to update from Custom Field?

Question

How could I update Summary field from another two or three  Custom Fields ?

Please help

Michael Kornatzki · Answer

Well, then i would try to create an own plugin with a javascript that implements some changeListeners on the customFields (https://api.jquery.com/change/) and than set the summary.

Zawistowski Grz · Answer

but I haven't have. It's to expensive.

Michael Kornatzki · Answer

Hi, you can do it with ScritpRunners Behaviours (https://scriptrunner.adaptavist.com/latest/jira/behaviours-overview.html).