Converting Object to an Array ES6 Way using object Keys(),Values() and entries() method:

const user = {
  fname: 'john',
  lname: 'doe',
};

Object.keys(user);
// ["fname", "lname"]

Object.values(user);
//["john", "doe"]

Object.entries(user);
//[["fname", "john"],["lname", "doe"]]

You can also Convert back to Array from Object using fromEntries() method:

const data = [
   ["fname", "john"],
   ["lname", "doe"]
];

Object.fromEntries(data);
//{fname: "john", lname: "doe"}