如何在cookie中存储对象？

const obj = {
  name: "John",
  age: 30,
  city: "New York"
};

const objString = JSON.stringify(obj);

function setCookie(name, value, days) {
  let expires = "";
  if (days) {
    const date = new Date();
    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
    expires = "; expires=" + date.toUTCString();
  }
  document.cookie = name + "=" + (value || "") + expires + "; path=/";
}

setCookie("myObject", objString, 1);