Add support for MathJax

layouts/partials/header.html

@@ -13,4 +13,6 @@
     <nav></nav>
 {{ end }}
 
+{{ if .Site.Params.mathjax }}{{ partial "mathjax_support.html" . }}{{ end }}
+
 {{ partial "header-extra.html" . }}

layouts/partials/mathjax_support.html

@@ -0,0 +1,22 @@
+<script>
+  MathJax = {
+    tex: {
+      inlineMath: [['$', '$'], ['\\(', '\\)']],
+      displayMath: [['$$','$$'], ['\\[', '\\]']],
+      processEscapes: true,
+      processEnvironments: true
+    },
+    options: {
+      skipHtmlTags: ['script', 'noscript', 'style', 'textarea', 'pre']
+    }
+  };
+
+  window.addEventListener('load', (event) => {
+      document.querySelectorAll("mjx-container").forEach(function(x){
+        x.parentElement.classList += 'has-jax'})
+    });
+
+</script>
+<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+<script type="text/javascript" id="MathJax-script" async
+  src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>