ensure having MathJax.Hub before set config for MathJax v2

Author: archmoj

Diff for: packages/javascript/jupyterlab-plotly/src/Figure.ts

@@ -826,9 +826,13 @@ export class FigureView extends DOMWidgetView {
     this.model.on("change:_py2js_update", this.do_update, this);
     this.model.on("change:_py2js_animate", this.do_animate, this);
 
-    // MathJax configuration
+    // MathJax v2 configuration
     // ---------------------
-    if ((window as any).MathJax) {
+    if (
+      (window as any).MathJax &&
+      (window as any).MathJax.Hub &&
+      (window as any).MathJax.Hub.Config
+    ) {
       (window as any).MathJax.Hub.Config({ SVG: { font: "STIX-Web" } });
     }
 

Diff for: packages/python/plotly/plotly/io/_base_renderers.py

@@ -236,7 +236,7 @@ def __init__(self, width=None, height=None, scale=None, engine="auto"):
 window.PlotlyConfig = {MathJaxConfig: 'local'};"""
 
 _mathjax_config = """\
-if (window.MathJax) {MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}"""
+if (window.MathJax && window.MathJax.Hub && window.MathJax.Hub.Config) {window.MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}"""
 
 
 class HtmlRenderer(MimetypeRenderer):

Diff for: packages/python/plotly/plotly/io/_html.py

@@ -20,7 +20,7 @@
 
 _mathjax_config = """\
 <script type="text/javascript">\
-if (window.MathJax) {MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}\
+if (window.MathJax && window.MathJax.Hub && && window.MathJax.Hub.Config) {window.MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}\
 </script>"""
 
 

Diff for: packages/python/plotly/plotly/offline/offline.py

@@ -190,7 +190,7 @@ def _get_jconfig(config=None):
 
 _mathjax_config = """\
 <script type="text/javascript">\
-if (window.MathJax) {MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}\
+if (window.MathJax && window.MathJax.Hub && window.MathJax.Hub.Config) {window.MathJax.Hub.Config({SVG: {font: "STIX-Web"}});}\
 </script>"""