load MathJax on pages that declare the stem attribute

Author: mojavelinux

src/partials/footer-scripts.hbs

@@ -1,5 +1,26 @@
 <script src="{{{uiRootPath}}}/js/site.js"></script>
 <script async src="{{{uiRootPath}}}/js/vendor/highlight.js"></script>
+{{#with (resolvePage page.relativeSrcPath model=false)}}
+{{#unless (eq ./asciidoc.attributes.stem undefined)}}
+<script type="text/x-mathjax-config">
+MathJax.Hub.Config({
+  messageStyle: "none",
+  tex2jax: { inlineMath: [["\\(", "\\)"]], displayMath: [["\\[", "\\]"]], ignoreClass: "nostem|nolatexmath" },
+  asciimath2jax: { delimiters: [["\\$", "\\$"]], ignoreClass: "nostem|noasciimath" },
+  TeX: { equationNumbers: { autoNumber: "none" } }
+})
+MathJax.Hub.Register.StartupHook("AsciiMath Jax Ready", function () {
+  MathJax.InputJax.AsciiMath.postfilterHooks.Add(function (data, node) {
+    if ((node = data.script.parentNode) && (node = node.parentNode) && node.classList.contains("stemblock")) {
+      data.math.root.display = "block"
+    }
+    return data
+  })
+})
+</script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/MathJax.js?config=TeX-MML-AM_HTMLorMML"></script>
+{{/unless}}
+{{/with}}
 {{#if env.ALGOLIA_API_KEY}}
 <script async id="search-script" src="{{{uiRootPath}}}/js/vendor/docsearch.js"{{#if env.ALGOLIA_APP_ID}} data-app-id="{{env.ALGOLIA_APP_ID}}"{{/if}} data-api-key="{{env.ALGOLIA_API_KEY}}" data-index-name="{{env.ALGOLIA_IDX_NAME}}" data-stylesheet="{{{uiRootPath}}}/css/vendor/docsearch.css"></script>
 {{#if page.home}}