From f7f376f91e4ef8fe9ddcfca7e871cf8195d5894c Mon Sep 17 00:00:00 2001
From: JJ Kasper <jj@jjsweb.site>
Date: Mon, 28 Sep 2020 18:47:05 -0500
Subject: [PATCH] Ensure optional-chaining/nullish coalescing is included
 (#17429)

---
 packages/next/build/babel/preset.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/next/build/babel/preset.ts b/packages/next/build/babel/preset.ts
index e4a4c660cc..8e660e7e02 100644
--- a/packages/next/build/babel/preset.ts
+++ b/packages/next/build/babel/preset.ts
@@ -79,6 +79,10 @@ module.exports = (
     // In production/development this option is set to `false` so that webpack can handle import/export with tree-shaking
     modules: 'auto',
     exclude: ['transform-typeof-symbol'],
+    include: [
+      '@babel/plugin-proposal-optional-chaining',
+      '@babel/plugin-proposal-nullish-coalescing-operator',
+    ],
     ...options['preset-env'],
   }
 
-- 
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