JavaScript Cookie Manager class.

cookieManager.js

/**
 * Cookie manager.
 * @author Amir Khawaja <khawaja.amir@gmail.com>
 * @license MIT
 * @constructor
 */
var CookieStore = function () {
  /**
   * Indicate if value is of type integer.
   * @param {*} value - The value to test.
   * @returns {boolean}
   * @private
   */
  this._isInteger = function (value) {
    return !isNaN(value) && parseInt(Number(value)) == value && !isNaN(parseInt(value, 10));
  }
};

/**
 * Get a cookie from the cookie store.
 * @param {string} key - The name of the cookie.
 * @returns {*}
 */
CookieStore.prototype.get = function (key) {
  var k;
  return (k = new RegExp('(?:^|;\\s*)' + ('' + key).replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&') + '=([^;]*)')
      .exec(document.cookie)) && k[1];
};

/**
 * Set a cookie.
 * @param {string} name - The name of the cookie.
 * @param {string} value - The value of the cookie.
 * @param {int} [days] - The number of days to keep the cookie.
 * @param {string} [path] - The path of the cookie.
 */
CookieStore.prototype.set = function (name, value, days, path) {
  var expires;
  if (days !== void 0 && this._isInteger(days)) {
    var date = new Date();
    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
    expires = "; expires=" + date.toGMTString();
  } else {
    expires = "";
  }

  var dir = path || '/';
  document.cookie = name + "=" + value + expires + "; path=" + dir;
};

/**
 * Delete a cookie.
 * @param {string} key - The name of the cookie.
 */
CookieStore.prototype.delete = function (key) {
  this.set(key, '', -1);
};