module LocalStorage
  def self.[](key)
    %x{
      var val = localStorage.getItem(key);
      return val === null ? nil : val;
    }
  end

  def self.[]=(key, value)
    `localStorage.setItem(key, value)`
  end

  def self.clear
    `localStorage.clear()`
    self
  end

  def self.delete(key)
    %x{
      var val = localStorage.getItem(key);
      localStorage.removeItem(key);
      return val === null ? nil : val;
    }
  end
end