attaching autocomplete renderer to multi-select custom field

[Ignat]

I'm trying to attach autocomplete renderer to multiselect customfield. It might look like labels renderer (but with no possibility to add new option to list of options from renderer directly) or like a column picker rendrer in issue navigator.

All I've found so far is that article

https://confluence.atlassian.com/jirakb/how-to-enable-autocomplete-renderer-for-multi-select-custom-field-in-jira-754978239.html

It is helpfull, it works for me, but I'd prefer more elegant solution, which does not need to enable html in fields description. I can Java, and I'd prefer to develope some Jira plugin, enabling to attach that renderer to any choosen multiselect customfield.

Can enybody give some hint, how that renderer is reacheble trough Jira Java API or connection of some velocity template etc.?

[Matt Doar]

I've found that in general the documentation for plugins that provide renderers for Jira is not great. However it seems that at least one person has worked out how to do this by creating new custom field types
https://marketplace.atlassian.com/apps/1220214/select2\

Perhaps you could use a ScriptRunner behaviour to do this, somewhat like https://scriptrunner.adaptavist.com/6.20.0/jira/script-fields/database-picker.html

[Ignat]

I've just developed plugin introdusing new customfield type with select2 vm teplate. it works well, only cons is that I can not change the appearance of alredy defined fields. only define new ones.

The question how to implement plugin, adding new renderer to list of  rendereres, availible to all existing multiselect fields, is still open.