why this sort is not working? const res = [
    {
        "id": 1,
        "chemical_name": "Acetic Acid",
        "vendor": "Chemical Inc.",
        "density": "1.05",
        "viscosity": "0.89",
        "packaging": "Bottle",
        "pack_size": "500",
        "unit": "mL",
        "quantity": 100
    },
    {
        "id": 2,
        "chemical_name": "Sodium Chloride",
        "vendor": "Salt Co.",
        "density": "2.16",
        "viscosity": "N/A",
        "packaging": "Bag",
        "pack_size": "1",
        "unit": "kg",
        "quantity": 50
    },
    {
        "id": 3,
        "chemical_name": "Ethanol",
        "vendor": "Solvent Supplies",
        "density": "0.789",
        "viscosity": "1.2",
        "packaging": "Drum",
        "pack_size": "20",
        "unit": "L",
        "quantity": 5
    },
    {
        "id": 4,
        "chemical_name": "Hydrochloric Acid",
        "vendor": "Acid Masters",
        "density": "1.19",
        "viscosity": "0.9",
        "packaging": "Barrel",
        "pack_size": "50",
        "unit": "L",
        "quantity": 10
    },
    {
        "id": 5,
        "chemical_name": "Sulfuric Acid",
        "vendor": "Acid Solutions",
        "density": "1.84",
        "viscosity": "21.5",
        "packaging": "Tank",
        "pack_size": "200",
        "unit": "L",
        "quantity": 2
    },
    {
        "id": 6,
        "chemical_name": "Sodium Bicarbonate",
        "vendor": "Baking Goods Ltd.",
        "density": "2.20",
        "viscosity": "N/A",
        "packaging": "Box",
        "pack_size": "500",
        "unit": "g",
        "quantity": 200
    },
    {
        "id": 7,
        "chemical_name": "Calcium Carbonate",
        "vendor": "Minerals Group",
        "density": "2.71",
        "viscosity": "N/A",
        "packaging": "Sack",
        "pack_size": "25",
        "unit": "kg",
        "quantity": 10
    },
    {
        "id": 8,
        "chemical_name": "Methanol",
        "vendor": "Pure Chemicals",
        "density": "0.791",
        "viscosity": "0.59",
        "packaging": "Bottle",
        "pack_size": "1",
        "unit": "L",
        "quantity": 30
    },
    {
        "id": 9,
        "chemical_name": "Benzene",
        "vendor": "Industrial Solvents",
        "density": "0.876",
        "viscosity": "0.65",
        "packaging": "Drum",
        "pack_size": "20",
        "unit": "L",
        "quantity": 7
    },
    {
        "id": 10,
        "chemical_name": "Hydrogen Peroxide",
        "vendor": "Oxidizers Ltd.",
        "density": "1.11",
        "viscosity": "1.4",
        "packaging": "Bulk",
        "pack_size": "100",
        "unit": "L",
        "quantity": 6
    },
    {
        "id": 11,
        "chemical_name": "Ammonium Hydroxide",
        "vendor": "Clean Solutions",
        "density": "0.90",
        "viscosity": "0.91",
        "packaging": "Bottle",
        "pack_size": "2",
        "unit": "L",
        "quantity": 15
    },
    {
        "id": 12,
        "chemical_name": "Acetone",
        "vendor": "Solvents R Us",
        "density": "0.784",
        "viscosity": "0.32",
        "packaging": "Can",
        "pack_size": "5",
        "unit": "L",
        "quantity": 20
    },
    {
        "id": 13,
        "chemical_name": "Chloroform",
        "vendor": "Chemical Warehouse",
        "density": "1.48",
        "viscosity": "0.56",
        "packaging": "Drum",
        "pack_size": "10",
        "unit": "L",
        "quantity": 8
    },
    {
        "id": 14,
        "chemical_name": "Glycerol",
        "vendor": "Biochemicals Ltd.",
        "density": "1.26",
        "viscosity": "1.5",
        "packaging": "Bottle",
        "pack_size": "1",
        "unit": "L",
        "quantity": 25
    },
    {
        "id": 15,
        "chemical_name": "Citric Acid",
        "vendor": "Food Ingredients Co.",
        "density": "1.54",
        "viscosity": "0.8",
        "packaging": "Bag",
        "pack_size": "500",
        "unit": "g",
        "quantity": 100
    }
]

res.sort((a,b) => a['packaging'] - b['packaging'])
console.log(res)