var arr = [{accountID: "-Ks8mWWekpN2BfOFcdbSM", itemName: "Petrol Charges At Esso"},

{accountID: "-Ks8mWWekpN2BfOFcdbS", itemName: "Hylo Lubricant Eye Drops 10ml"},

{accountID: "-Ks8mWWekpN2BfOFcdbS", itemName: "Genteal Gel, Sterile Lubricant Eye Gel, 10g"},

{accountID: "-Ks8mWWekpN2BfOFcdbS", itemName: "Genteal Gel, Sterile Lubricant Eye Gel, 10g"},

{accountID: "-Ks8mWWekpN2BfOFcdbS", itemName: "Blink Intensive Tears Protective Eye Drops 0.4mlx20"},

{accountID: "-Ks8mWWekpN2BfOFcdbS", itemName: "Palmers White And Even Dark Circles Eye Treatment Cream 15ml"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Sensitive Pro-relief With Whitening Toothpaste 110g"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "2 In 1 Pure Breath Toothpaste"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Antibackterial Mouthwash 200ml"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Akira 1.7l Jug Kettle Jk1718c"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Duracell Alkaline Batteries Aaa 12s"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Osram Led Star Classic A100 Light Bulb - Frosted Warm White 10.5w/827"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Sharks Fin Soup With Crab Meat And Cordyceps"},

{accountID: "-Ks8mWWq445Uao_9sgNn", itemName: "Chilli Fried Rice With Shrimps"}];

​

//console.log(arr);

​

arr.sort(function(a, b){

   if(a.accountID < b.accountID) return -1;

    if(a.accountID > b.accountID) return 1;

    return 0;

});

​

console.log(arr);

​

​