code: function setItem(itemName, itemValue) {
    data[itemName] = itemValue;
    if (localExists()) {
      // Convert object to string
      if ((0, _isObject2.default)(itemValue)) {
        itemValue = JSON.stringify(itemValue);
      }
      window.sessionStorage.setItem(itemName, itemValue);
    }
  }
docs: @description
  Safley sets item to session storage. Alias: item()
  
  @param {String} itemName The items name
  @param {String} itemValue The items value