code: def extra_html_properties(self, prefix=None, postfix=None, template_type=None):
          '''
          Return extra html properties to allow individual apps to be styled separately.
  
          The content returned from this function is injected unescaped into templates.
          '''
  
          prefix = prefix if prefix else "django-plotly-dash"
  
          post_part = "-%s" % postfix if postfix else ""
          template_type = template_type if template_type else "iframe"
  
          slugified_id = self.slugified_id()
  
          return "%(prefix)s %(prefix)s-%(template_type)s %(prefix)s-app-%(slugified_id)s%(post_part)s" % {'slugified_id':slugified_id,
                                                                                                           'post_part':post_part,
                                                                                                           'template_type':template_type,
                                                                                                           'prefix':prefix,
                                                                                                          f extra_html_properties(self, prefix=None, postfix=None, template_type=None):
          '''
          Return extra html properties to allow individual apps to be styled separately.
  
          The content returned from this function is injected unescaped into templates.
          '''
  
          prefix = prefix if prefix else "django-plotly-dash"
  
          post_part = "-%s" % postfix if postfix else ""
          template_type = template_type if template_type else "iframe"
  
          slugified_id = self.slugified_id()
  
          return "%(prefix)s %(prefix)s-%(template_type)s %(prefix)s-app-%(slugified_id)s%(post_part)s" % {'slugified_id':slugified_id,
                                                                                                           'post_part':post_part,
                                                                                                           'template_type':template_type,
                                                                                                           'prefix':prefix,
                                                                                                          }
docs: Return extra html properties to allow individual apps to be styled separately.
  
          The content returned from this function is injected unescaped into templates.