const searchParams = {};

​

const email = "email"

  // const email = getCookie("email");

  const firstname = "firstname"

  // const firstname = getCookie("firstname");

  const lastname = "lastname"

  // const lastname = getCookie("lastname");

  const phone = "phone"

  // const phone = getCookie("phone");

​

  // const cookieValues = {

  //   email,

  //   firstname,

  //   lastname,

  //   phone,

  // };

  let cookieValues = {}

  if (email) { cookieValues.email = email}

  if (firstname) { cookieValues.firstname = firstname}

  if (lastname) { cookieValues.lastname = lastname}

  if (phone) { cookieValues.phone = phone}

  Object.assign(searchParams, cookieValues);

const searchParams = {};

const email = "email";

  const firstname = "firstname";

  const lastname = "lastname";

  const phone = "phone";

​

Object.assign(searchParams, {

    email,

    firstname,

    lastname,

    phone,

  });