cookies.js

const setCookie = function(name,value,days) {
  let expires = "";
  if (days) {
    let date = new Date();
    date.setDate(date.getDate() + days);
    expires = "; expires=" + date.toUTCString();
  }
  document.cookie = name + "=" + (value || "")  + expires + "; path=/";
};

const getCookie = function(name) {
  let nameEQ = name + "=";
  let ca = document.cookie.split(';');
  for(let i=0;i < ca.length;i++) {
    let c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
};

const forgetCookie = function(name) {   
  document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/'
};