Why do we use Type in the Export?

[hejhrewjk]

[BonesIsUseless (Bones)]

if i had a module script

local WeaponData = {}
export type WeaponInfo = {["Damage"]: number}

WeaponData.Axe = {["Damage"] = 5}
WeaponData.Sword = {["Damage"] = 3}

return WeaponData

i can use the type WeaponInfo so i can know what “Properties” weapons have

local RS = game:GetService("ReplicatedStorage")
local WeaponData = require(RS.WeaponData)
type WeaponInfo = WeaponData.WeaponInfo

local function NewWeapon(WeaponInfo: WeaponInfo)
  return WeaponInfo
end

local Axe = NewWeapon({["Damage"] = 3}) -- I know Weapons have a damage "property" because of the type WeaponInfo