code: def save_requirejs(target="", version="2.3.4"):
      
      url = "https://cdnjs.cloudflare.com/ajax/libs/require.js/{version}/require.min.js".format(version=version)
      filename = "require.min.v{0}.js".format(version)
      filepath = os.path.join(target, filename)
      download_to_file(url, filepath)
      return filename
docs: Download and save the require javascript to a local file.
  
      :type target: str
      :type version: str