From faa6c9f7083a3f46cb7e82da9b339c0525e03317 Mon Sep 17 00:00:00 2001
From: Justin Ridgewell <justin@ridgewell.name>
Date: Mon, 5 Jun 2017 13:56:28 -0400
Subject: [PATCH] Use nil

---
 packages/babel-plugin-transform-optional-chaining/src/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/babel-plugin-transform-optional-chaining/src/index.js b/packages/babel-plugin-transform-optional-chaining/src/index.js
index 4272827238..f32eb713ec 100644
--- a/packages/babel-plugin-transform-optional-chaining/src/index.js
+++ b/packages/babel-plugin-transform-optional-chaining/src/index.js
@@ -4,6 +4,7 @@ export default function ({ types: t }) {
   function optional(path, key, replacementPath, needsContext = false, loose = false) {
     const { scope } = path;
     const optionals = [path.node];
+    const nil = scope.buildUndefinedNode();
 
     let objectPath = path.get(key);
     while (objectPath.isMemberExpression()) {
@@ -65,7 +66,7 @@ export default function ({ types: t }) {
 
       replacementPath.replaceWith(t.conditionalExpression(
         t.binaryExpression("==", check, t.nullLiteral()),
-        scope.buildUndefinedNode(),
+        nil,
         replacementPath.node
       ));