code: def jcrop_js(js_url=None, with_jquery=True):
          
          serve_local = current_app.config['AVATARS_SERVE_LOCAL']
  
          if js_url is None:
              if serve_local:
                  js_url = url_for('avatars.static', filename='jcrop/js/jquery.Jcrop.min.js')
              else:
                  js_url = 'https://cdn.jsdelivr.net/npm/jcrop-0.9.12@0.9.12/js/jquery.Jcrop.min.js'
  
          if with_jquery:
              if serve_local:
                  jquery = '<script src="%s"></script>' % url_for('avatars.static', filename='jcrop/js/jquery.min.js')
              else:
                  jquery = '<script src="https://cdn.jsdelivr.net/npm/jcrop-0.9.12@0.9.12/js/jquery.min.js"></script>'
          else:
              jquery = ''
          return Markup('''%s\n<script src="%s"></script>
          ''' % (jquery, js_url))
docs: Load jcrop Javascript file.
  
          :param js_url: The custom JavaScript URL.
          :param with_jquery: Include jQuery or not, default to ``True``.