Render a chart or page to local html files.

        :param chart: A Chart or Page object
        :param path: The destination file which the html code write to
        :param template_name: The name of template file.

def render_chart_to_file(self, template_name: str, chart: Any, path: str):
        """
        Render a chart or page to local html files.

        :param chart: A Chart or Page object
        :param path: The destination file which the html code write to
        :param template_name: The name of template file.
        """
        tpl = self.env.get_template(template_name)
        html = tpl.render(chart=self.generate_js_link(chart))
        write_utf8_html_file(path, self._reg_replace(html))