<script>
  // https://www.micdz.cn/article/katex-on-volantis/
  if (typeof renderMathInElement == "undefined") {
    volantis.css("<%= theme.cdn.katex_css %>")
    function pjax_katex() {
      volantis.js("<%= theme.cdn.katex_render %>").then(()=>{
        renderMathInElement(document.body);
      })
    }
    volantis.js("<%= theme.cdn.katex_js %>").then(pjax_katex)
    volantis.pjax.push(pjax_katex)
  }
</script>