example_providers.lua

mod:provider 'health' {
  function(unit, event, ...)
    if some_example then
      return  -- return nothing to not update frames
    end
    return UnitHealth(unit), UnitHealthMax(unit)  -- returned values get sent as signal to unit frame
  end,
  updatefor = {'.*'},  -- invoke for all units
  unitevents = {'UNIT_HEALTH','UNIT_MAXHEALTH'},  -- invoke for event's arg1 unit on these events
  events = { ['.*'] = 'PLAYER_ENTERING_WORLD' },  -- also invoke on PEW for all valid units
  timers = { ['player'] = .1 },  -- also invoke every .1 sec for player
  resolve = true,  -- also invoke immediately when unit changes
}