localStorage.js

/**
 * LOCAL STORAGE MANAGEMENT FUNCTION
 * @param options - local(bool), content(object), backup(bool)
 * @param key
 * STORE CONTENT locally or in cookie or BOTH
 *
 * HOW TO USE:
  localStorage('key') // Returns the content if existing, or false if it doesnt
  localStorage('key', {
    content: the content, can be a raw object, string or raw array // it is stringified by the function
    local: true/false // yes or no if you want to store only in localStorage
  })
 */
var localStorage = function(key, options) {
  if (options) { // store this data
    if (!options.local) {
      localStorage.setItem(key, JSON.stringify(options.content));
    } else { // also in cookie too
      if ($.cookie) $.cookie(key, options.content);
      localStorage.setItem(key, JSON.stringify(options.content));
    }
  } else if (options === false) { // if options == false
    localStorage.removeItem(key);
    if ($.cookie) $.cookie(key, false); // remove everything
  }

  // if only one argument is given retrieve that data from localstorage
  return arguments.length == 1 ? JSON.parse(localStorage.getItem(key)) : false;
}