From 2f213fe6914be2d4f0ef486b2cf113e63b7cc9a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micka=C3=ABl=20V=C3=A9ril?= <mveril@irsamc.ups-tlse.fr>
Date: Thu, 30 Apr 2020 20:31:30 +0200
Subject: [PATCH] Check if MathJax.typesetPromise exist before define it in the
 polyfill

---
 static/js/MathJaxPolyfill.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/static/js/MathJaxPolyfill.js b/static/js/MathJaxPolyfill.js
index 6c09d8ce..66f83b30 100644
--- a/static/js/MathJaxPolyfill.js
+++ b/static/js/MathJaxPolyfill.js
@@ -1,8 +1,10 @@
 function MathJaxPolyfillInit(){
-  var typesetPromise = function() {
-    return new Promise(function (resolve, reject) {
-      MathJax.Hub.Queue(["Typeset",MathJax.Hub],[resolve]);
-    })
+  if (!MathJax.typesetPromise) {
+    var typesetPromise = function() {
+      return new Promise(function (resolve, reject) {
+        MathJax.Hub.Queue(["Typeset",MathJax.Hub],[resolve]);
+      })
+    }
+    MathJax.typesetPromise=typesetPromise 
   }
-  MathJax.typesetPromise=typesetPromise
 }
\ No newline at end of file