From b8e4b5f8841a8357eff1d42bffa35839d903e3ca Mon Sep 17 00:00:00 2001
From: David Taylor <david@taylorhq.com>
Date: Thu, 27 Feb 2020 12:13:07 +0000
Subject: [PATCH] FIX: Polyfill Promise for IE11 (#9057)

Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
---
 plugins/discourse-internet-explorer/public/js/ie.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/plugins/discourse-internet-explorer/public/js/ie.js b/plugins/discourse-internet-explorer/public/js/ie.js
index 4c0fbf5fd8e..6c998e402a1 100644
--- a/plugins/discourse-internet-explorer/public/js/ie.js
+++ b/plugins/discourse-internet-explorer/public/js/ie.js
@@ -970,3 +970,12 @@ if (!String.prototype.startsWith) {
   return ES6;
 });
 /* eslint-enable */
+
+// Polyfill Promise - used by popper.js
+window.addEventListener(
+  "load",
+  function() {
+    window.Promise = require("rsvp").Promise;
+  },
+  false
+);