From 5dc1cc54d5080799f53f16307f1a5b7d4627f6a3 Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Thu, 21 May 2020 10:26:24 +0100
Subject: [PATCH] Add basic Array.from polyfill for IE11

---
 .../@node-red/editor-client/src/js/polyfills.js       | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/packages/node_modules/@node-red/editor-client/src/js/polyfills.js b/packages/node_modules/@node-red/editor-client/src/js/polyfills.js
index 1a7caf121..2f6ed324c 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/polyfills.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/polyfills.js
@@ -18,17 +18,22 @@
             // changes to support iterables.
             throw new Error("Missing Array.from base polyfill");
         }
-        Array._from = Array.from;
         Array.from = function() {
+            if (arguments.length > 1) {
+                throw new Error("Node-RED's IE11 Array.from polyfill doesn't support multiple arguments");
+            }
             var arrayLike = arguments[0]
             if (arrayLike.forEach) {
                 var result = [];
                 arrayLike.forEach(function(i) {
                     result.push(i);
                 })
-                return result;
+            } else {
+                for (var i=0;i<arrayLike.length;i++) {
+                    result.push(arrayList[i]);
+                }
             }
-            return Array._from.apply(null,arguments);
+            return result;
         }
     }
 })();