code: def render_embed_js(self, js_embed: Iterable[bytes]) -> bytes:
          
          return (
              b'<script type="text/javascript">\n//<![CDATA[\n'
              + b"\n".join(js_embed)
              + b"\n//]]>\n</script>"
          )
docs: Default method used to render the final embedded js for the
          rendered webpage.
  
          Override this method in a sub-classed controller to change the output.