hexo-theme-stellar/layout/_partial/plugins/comments/giscus/layout.ejs

<%
function layoutDiv() {
  var el = '';
  const cmt = page.cmt;
  if (cmt?.service?.length > 0) {
    const name = cmt.service;
    var body = cmt[name];
    if (theme.style.prefers_theme != 'auto' && body['data-theme'] == 'preferred_color_scheme') {
      body['data-theme'] = theme.style.prefers_theme
    }
    el += '<div id="' + name + '"';
    for (let key of Object.keys(body)) {
      if (body[key] !== null) {
        el += ' ' + key + '="' + body[key] + '"';
      }
    }
    el += '></div>';
  }
  return el;
}
%>

<%- icon('default:loading') %>

<%- layoutDiv() %>