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diff --git a/js/mathjax/jax/output/CommonHTML/autoload/mglyph.js b/js/mathjax/jax/output/CommonHTML/autoload/mglyph.js
new file mode 100644
index 0000000..3f1f269
--- /dev/null
+++ b/js/mathjax/jax/output/CommonHTML/autoload/mglyph.js
@@ -0,0 +1,96 @@
+// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0
+/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+
+/*************************************************************
+ *
+ *  MathJax/jax/output/CommonHTML/autoload/mglyph.js
+ *  
+ *  Implements the CommonHTML output for <mglyph> elements.
+ *
+ *  ---------------------------------------------------------------------
+ *  
+ *  Copyright (c) 2015-2020 The MathJax Consortium
+ * 
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+MathJax.Hub.Register.StartupHook("CommonHTML Jax Ready",function () {
+  var VERSION = "2.7.9";
+  var MML = MathJax.ElementJax.mml,
+      CHTML = MathJax.OutputJax.CommonHTML,
+      LOCALE = MathJax.Localization;
+  
+  MML.mglyph.Augment({
+    toCommonHTML: function (node,options) {
+      var values = this.getValues("src","width","height","valign","alt");
+      node = this.CHTMLcreateNode(node);
+      this.CHTMLhandleStyle(node);
+      this.CHTMLhandleScale(node);
+      if (values.src === "") {
+        var index = this.Get("index");
+        this.CHTMLgetVariant();
+        if (index && this.CHTMLvariant.style)
+          this.CHTMLhandleText(node,String.fromCharCode(index),this.CHTMLvariant);
+      } else {
+        var bbox = this.CHTML;
+        if (!bbox.img) bbox.img = MML.mglyph.GLYPH[values.src];
+        if (!bbox.img) {
+          bbox.img = MML.mglyph.GLYPH[values.src] = {img: new Image(), status: "pending"};
+          bbox.img.img.onload  = MathJax.Callback(["CHTMLimgLoaded",this]);
+          bbox.img.img.onerror = MathJax.Callback(["CHTMLimgError",this]);
+          bbox.img.img.src = values.src;
+          MathJax.Hub.RestartAfter(bbox.img.img.onload);
+        }
+        if (bbox.img.status !== "OK") {
+          var err = MML.Error(LOCALE._(["MathML","BadMglyph"],"Bad mglyph: %1",values.src));
+          err.data[0].data[0].mathsize = "75%";
+          this.Append(err); err.toCommonHTML(node); this.data.pop();
+          bbox.combine(err.CHTML,0,0,1);
+        } else {
+          var img = CHTML.addElement(node,"img",{
+            isMathJax:true, src:values.src, alt:values.alt, title:values.alt
+          });
+          var w = values.width, h = values.height;
+          var W = bbox.img.img.width/CHTML.em, H = bbox.img.img.height/CHTML.em;
+          var WW = W, HH = H;
+          if (w !== "") {W = this.CHTMLlength2em(w,WW); H = (WW ? W/WW * HH : 0)}
+          if (h !== "") {H = this.CHTMLlength2em(h,HH); if (w === "") W = (HH ? H/HH * WW : 0)}
+          img.style.width  = CHTML.Em(W); bbox.w = bbox.r = W;
+          img.style.height = CHTML.Em(H); bbox.h = bbox.t = H;
+          if (values.valign) {
+            bbox.d = bbox.b = -this.CHTMLlength2em(values.valign,HH);
+            img.style.verticalAlign = CHTML.Em(-bbox.d);
+            bbox.h -= bbox.d; bbox.t = bbox.h;
+          }
+        }
+      }
+      this.CHTMLhandleSpace(node);
+      this.CHTMLhandleBBox(node);
+      this.CHTMLhandleColor(node);
+      return node;
+    },
+    CHTMLimgLoaded: function (event,status) {
+      if (typeof(event) === "string") status = event;
+      this.CHTML.img.status = (status || "OK");
+    },
+    CHTMLimgError: function () {this.CHTML.img.img.onload("error")}
+  },{
+    GLYPH: {}    // global list of all loaded glyphs
+  });
+  
+  MathJax.Hub.Startup.signal.Post("CommonHTML mglyph Ready");
+  MathJax.Ajax.loadComplete(CHTML.autoloadDir+"/mglyph.js");
+});
+
+// @license-end