simple cookie util.

Cookie.ts

var escape = encodeURIComponent;
var unescape = decodeURIComponent;

export function getItem(sKey) {
  if(!sKey || !has(sKey)) { return null; }
  return unescape(document.cookie.replace(new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*"), "$1"));
}

export function setItem(sKey, sValue) {
  if(!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) { return; }
  document.cookie = escape(sKey) + "=" + escape(sValue) + '';
}

export function remove(sKey) {
  if(!sKey || !has(sKey)) { return; }
  document.cookie = escape(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT";
}

export function has(sKey) {
  return (new RegExp("(?:^|;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);
}