Scheduler ResourceHeaderClickJavaScript

I recommend using RowClickJavaScript instead. It handles the JavaScript onRowClick event:
https://api.daypilot.org/daypilot-scheduler-onrowclick/

You can access the resource id using args.row.id there:

<DayPilot:DayPilotScheduler
  RowClickHandling="JavaScript"
  RowClickJavaScript="console.log('id', args.row.id);"
  ...
/>

Thank you Dan,

I couldn't make it work
The only combination that works for me is:

ResourceHeaderClickHandling="JavaScript"
ResourceHeaderClickJavaScript="ChangeRoom(2);"

I just need to replace the (2) for a anything I could identify the row, to calculate the roomid

In ResourceHeaderClickJavaScript, you can use "resource.value" to get the resource id:

ResourceHeaderClickJavaScript="ChangeRoom(resource.value);"

I got it. Thanks much for your help Dan.