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

<script>
  function utterances(){
    if(!document.getElementById("utterances"))return;
    setTimeout(function() {
      var checkUtterances = setInterval(function () {
        var el = document.getElementById("utterances");
        if (!el) return
        clearInterval(checkUtterances)
        try {
          el.innerHTML="";
        } catch (error) {}
        var script = document.createElement('script');
        script.src = 'https://utteranc.es/client.js';
        const keys = ['repo', 'issue-term', 'theme', 'label', 'crossorigin'];
        keys.forEach((key, i) => {
          if (el.attributes[key] && el.attributes[key].value) {
            script.setAttribute(key, el.attributes[key].value);
          }
        });
        el.appendChild(script);
       }, 200)
    });
  }
  utterances();
</script>