WoW API: UnitAffectingCombat

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UnitAffectingCombat -Documentation by Flickering-

Determine whether a unit is in combat or has aggro.

affectingCombat = UnitAffectingCombat("unit");

Parameters

("unit")

unit: String - The UnitId of the unit to check (Tested with "player", "pet", "party1", hostile "target")

affectingCombat: Flag - Returns 1 if the unit is in combat or has aggro, nil otherwise.

Goes true when initiating combat.

Goes true if aggroed, even if enemy doesn't land a blow.

If a hunter, then goes true shortly after pet enters combat.

If using timed spell such as aimed shot, goes true when spell fires (not during charge up).

Goes to false on death.

Is false if the unit being checked for aggro is out of range, or in another zone.

Note: remains false if a unit is proximity-aggroed. It wont go true until it either attacks or is attacked.