Get all Storage Items

storage.getItems.js

Storage.prototype.getItems = function () {
  var items = {};
  for(var i=0; i < this.length; i++) {
    var itemKey = this.key(i),
        itemValue = this.getItem(itemKey);

    Object.defineProperty(items, itemKey, {
     value: itemValue
    });
  }
  return items;
};

// Usage
localStorage.getItems();