hexo-theme-stellar/layout/_partial/plugins/comments/utterances/script.ejs

<%
if (page.utterances == undefined) {
  page.utterances = theme.comments.utterances;
} else {
  for (let key of Object.keys(theme.comments.utterances)) {
    if (page.utterances[key] == undefined) {
      page.utterances[key] = theme.comments.utterances[key];
    }
  }
}
%>
<script>
  function pjax_utterances(){
    if(!document.getElementById("utterances"))return;
    setTimeout(function() {
      var checkUtterances = setInterval(function () {
        var HEAD = document.getElementById("utterances");
        if (!HEAD) return
        clearInterval(checkUtterances)
        try {
          HEAD.innerHTML="";
        } catch (error) {}
        var script = document.createElement('script');
        script.setAttribute('src','https://utteranc.es/client.js');
        script.setAttribute('repo','<%- page.utterances.repo %>');
        let issuenumber = '<%- page.utterances['issue-number'] || page.comment_id %>';
        if (issuenumber) {
          script.setAttribute('issue-term', issuenumber);
        } else {
          script.setAttribute('issue-term', '<%- page.utterances['issue-term'] %>');
        }
        script.setAttribute('theme', '<%- page.dark ? page.utterances.theme.dark : page.utterances.theme.light %>' );
        script.setAttribute('label','<%- page.utterances.label %>');
        script.setAttribute('crossorigin','<%- page.utterances.crossorigin %>');
        HEAD.appendChild(script);
       }, 200)
    });
  }
  pjax_utterances();
</script>