In "Vanilla" and early versions of WoW Classic , the game server did not send absolute health values (e.g., "1,200/1,200") to the client for enemy NPCs; it only sent percentages (0–100%). functions as a persistent database and calculation engine to solve this:
: The script tracks the damage dealt to a target and compares it to the percentage drop in the target’s health bar. If a player deals 100 damage and the mob's health drops by 10%, the script calculates the total health as 1,000 HP. MobHealth.lua
: Once a mob's health is calculated, MobHealth.lua saves this data to the player's SavedVariables folder . This ensures that the next time the player targets that specific NPC type at that level, the health is immediately visible without needing to deal damage again. In "Vanilla" and early versions of WoW Classic