From d1320548a455cdab42c45e76d592e12a274fefb9 Mon Sep 17 00:00:00 2001
From: Joe Haddad <timer150@gmail.com>
Date: Wed, 19 Sep 2018 15:23:58 -0400
Subject: [PATCH] Lock babel configuration back to IE 9 support (ES5)

---
 packages/babel-preset-react-app/create.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/babel-preset-react-app/create.js b/packages/babel-preset-react-app/create.js
index 2ead09570f6..70bd4e8e478 100644
--- a/packages/babel-preset-react-app/create.js
+++ b/packages/babel-preset-react-app/create.js
@@ -45,7 +45,7 @@ module.exports = function(api, opts, env) {
         require('@babel/preset-env').default,
         {
           targets: {
-            node: '6.12',
+            node: 'current',
           },
         },
       ],
@@ -53,6 +53,14 @@ module.exports = function(api, opts, env) {
         // Latest stable ECMAScript features
         require('@babel/preset-env').default,
         {
+          // We want Create React App to be IE 9 compatible until React itself
+          // no longer works with IE 9
+          targets: {
+            ie: 9,
+          },
+          // Users cannot override this behavior because this Babel
+          // configuration is highly tuned for ES5 support
+          ignoreBrowserslistConfig: true,
           // `entry` transforms `@babel/polyfill` into individual requires for
           // the targeted browsers. This is safer than `usage` which performs
           // static code analysis to determine what's required.