웹 애플리케이션에서 쿠키를 효율적으로 생성하고 삭제하는 방법은 무엇입니까?

function setCookie(c_name, value, days) {
  var d = new Date();
  d.setTime(d.getTime() + (days * 24 * 60 * 60 * 1000));
  document.cookie = c_name + "=" + escape(value) + ";expires=" + d.toUTCString();
}

function delete_cookie(name, path, domain) {
  if (get_cookie(name)) {
    document.cookie = name + "=;" +
      ((path) ? ";path=" + path : "") +
      ((domain) ? ";domain=" + domain : "") +
      ";expires=Thu, 01 Jan 1970 00:00:01 GMT";
  }
}

function get_cookie(name) {
  return document.cookie.split(';').some(c => {
    return c.trim().startsWith(name + '=');
  });
}