Button properties data on ojAction

Summary

Button properties data on ojAction

Content

on ojAction, I am mapping $event.detail to Action Chain Variable("detail") and trying to get id of button by $variables.detail.id....it is throwing error ...

I printed $variables.detail by json.stringify...output is coming as  {"originalEvent":{"isTrusted":true}}

How to get id of oj-button on click......do I need JS function here, I thought we can get properties of each component with $event.detail action....

Thanks...