Forming an array format for multi row insertion nodejs-mysql

I have an object item like below

var item = {"9":"9","22":"22","23":"23","24":"24"};

and variables var cart = 23; and var group = 40;

Now I want to form those items in a format such that I can perform multi-row MySQL insert like below

var sql = "INSERT INTO test (item, cart, group) VALUES ?";
var values = [
    [9, 23, 40],
    [22, 23, 40],
    [23, 23, 40],
    [24, 23, 40]
];

I need to form the above array format to perform multi rows insert in node js. How to make the above format?

via SO-user