inventory and Item

Bags, the bank, equipment and the items in them.

inventory lists the items in your bags, shared slots, bank and equipment as Item handles. An Item is tied to its slot and the item that was in it: once the item is used up or moved, item:valid() is false and its other methods return nil.

for _, item in ipairs(inventory.items()) do
    if item:rarity() == inventory.RARITY_JUNK then
        print("junk:", item:name(), item:quantity())
    end
end

local kit = inventory.find("Basic Salvage Kit")
local loot = inventory.find(19721)
if kit and loot then loot:salvage(kit) end

A container is one of "items" (what's in your bags, the default), "bags" (the bags themselves), "shared" (shared inventory slots), "bank" or "equipment".

#inventory

#Item

What the item is:

What you can do with it. The ones that return a boolean return false when the item is gone.

#Constants

inventory.RARITY_COLORS maps each rarity's name (junk, basic, fine, masterwork, rare, exotic, ascended, legendary) to the color the game uses for it.