From 3312362cced3263b4fa5116a81300a93e4a15643 Mon Sep 17 00:00:00 2001
From: laurenwalker <walker@nceas.ucsb.edu>
Date: Tue, 3 Dec 2019 18:30:39 -0600
Subject: [PATCH] Added Polyfill for NodeList.forEach() so showdown-katex works
 in IE and earlier versions of Edge Related to #1197

---
 src/loader.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/loader.js b/src/loader.js
index af3901066..20180a4be 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -375,6 +375,12 @@ MetacatUI.preventCompatibilityIssues = function(){
         return -1;
       };
     }
+
+    //Polyfill for NodeList.forEach, which isn't supported in IE at all, or Edge before v16.
+    // https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach#Polyfill
+    if (window.NodeList && !NodeList.prototype.forEach) {
+      NodeList.prototype.forEach = Array.prototype.forEach;
+    }
 }
 
 if (typeof Object.assign != 'function') {