From 9b1546f131772185b3d39d18b6e57dc41ff5c7ca Mon Sep 17 00:00:00 2001
From: Jorge del Casar <948953+jorgecasar@users.noreply.github.com>
Date: Sun, 4 Apr 2021 10:51:09 +0200
Subject: [PATCH] fix: generate esm correctly (#5087)

---
 babel.config.js                       | 7 ++++++-
 packages/netlify-cms-app/package.json | 1 +
 packages/netlify-cms/package.json     | 1 +
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/babel.config.js b/babel.config.js
index b7c1efbf..ff109df5 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -88,7 +88,12 @@ const svgo = {
 function presets() {
   return [
     '@babel/preset-react',
-    '@babel/preset-env',
+    [
+      '@babel/preset-env',
+      {
+        modules: isESM ? false : 'auto',
+      },
+    ],
     [
       '@emotion/babel-preset-css-prop',
       {
diff --git a/packages/netlify-cms-app/package.json b/packages/netlify-cms-app/package.json
index 3cd7b995..deda3fb8 100644
--- a/packages/netlify-cms-app/package.json
+++ b/packages/netlify-cms-app/package.json
@@ -5,6 +5,7 @@
   "homepage": "https://www.netlifycms.org",
   "repository": "https://github.com/netlify/netlify-cms/tree/master/packages/netlify-cms-app",
   "bugs": "https://github.com/netlify/netlify-cms/issues",
+  "module": "dist/esm/index.js",
   "main": "dist/netlify-cms-app.js",
   "files": [
     "src/",
diff --git a/packages/netlify-cms/package.json b/packages/netlify-cms/package.json
index 55c76678..e814d839 100644
--- a/packages/netlify-cms/package.json
+++ b/packages/netlify-cms/package.json
@@ -5,6 +5,7 @@
   "homepage": "https://www.netlifycms.org",
   "repository": "https://github.com/netlify/netlify-cms",
   "bugs": "https://github.com/netlify/netlify-cms/issues",
+  "module": "dist/esm/index.js",
   "main": "dist/netlify-cms.js",
   "scripts": {
     "webpack": "node --max_old_space_size=4096 ../../node_modules/webpack/bin/webpack.js",