const getItem = key => {

  let ca = document.cookie.split('; ');

  for (let i = 0; i < ca.length; i++) {

    let item = ca[i].split('=');

    if (item[0] === key) {

      return item[1];

    }

  }

  return '';

}

const setItem = (key, value, second = 86400) => {

  let d = new Date();

  d.setTime(d.getTime() + (second * 1000))

  let expires = 'expires=' + d.toUTCString();

  document.cookie = key + '=' + value + ';' + expires;

}

const deleteItem = key => {

  setItem(key, '', -1)

}