Установка, выборка и удаление куков на чистом js

cookie.js

// Set Cookie
function setCookie(name, value, options) {
  options = options || {};

  var expires = options.expires;

  if (typeof expires == "number" && expires) {
	var d = new Date();
	d.setTime(d.getTime() + expires * 1000);
	expires = options.expires = d;
  }
  if (expires && expires.toUTCString) {
	options.expires = expires.toUTCString();
  }

  value = encodeURIComponent(value);

  var updatedCookie = name + "=" + value;

  for (var propName in options) {
	updatedCookie += "; " + propName;
	var propValue = options[propName];
	if (propValue !== true) {
	  updatedCookie += "=" + propValue;
	}
  }

  document.cookie = updatedCookie;
}
setCookie('name', 'value', {'path':'/', 'expires':3604324334});

// Get cookie
function getCookie(name) {
  var matches = document.cookie.match(new RegExp(
	"(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
  ));
  return matches ? decodeURIComponent(matches[1]) : undefined;
}
getCookie('name')

// Del cookie
function deleteCookie(name) {
  setCookie(name, "", {
	expires: -1
  })
}