{%- if page.content contains "$$" -%}
    <script>
      window.MathJax = {% if site.mathjax %}{{ site.mathjax | jsonify }}{% else %}{}{% endif %};
    </script>
    <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax/es5/tex-svg-full.js"></script>
{%- endif %}