[Talyrius]

Originally Posted by syncrow For WoD, I plan to use the exp-bar otherwise at maxlvl.

--[[
For finding the maximum attainable player level:
    0: WoW Classic. Level 60
    1: The Burning Cruade. Level 70
    2: Wrath of the Lich King. Level 80
    3: Cataclysm. Level 85
    4: Mists of Pandaria. Level 90
    5: Warlords of Draenor. Level 100
--]]
local maxPlayerLevel = MAX_PLAYER_LEVEL_TABLE[GetExpansionLevel()]
 
-- Check if player is already max level
local displayXP = true
if UnitLevel("player") == maxPlayerLevel then
    displayXP = false
end
 
-- Disable XP bar upon hitting max level
local frame = CreateFrame("Frame")
frame:RegisterEvent("PLAYER_LEVEL_UP")
frame:SetScript("OnEvent", function(self, event, level)
    if level == maxPlayerLevel then
        displayXP = false
    end
end)

If I've misunderstood, please clarify.