Convert @primer/react to ESM, don't generate CommonJS bundle.

.changeset/nervous-keys-draw.md

@@ -0,0 +1,5 @@
+---
+"@primer/react": major
+---
+
+Convert @primer/react to ESM and no longer generate CommonJS bundle.

babel.config.js → babel.config.cjs

@@ -1,4 +1,4 @@
-const defines = require('./babel-defines')
+const defines = require('./babel-defines.cjs')
 
 function replacementPlugin(env) {
   return ['babel-plugin-transform-replace-expressions', {replace: defines[env]}]

docs/gatsby-node.js

@@ -1,4 +1,4 @@
-const defines = require('../babel-defines')
+const defines = require('../babel-defines.cjs')
 const docgen = require('react-docgen-typescript')
 const globby = require('globby')
 

package.json

@@ -6,29 +6,21 @@
   "module": "lib-esm/index.js",
   "exports": {
     ".": {
-      "import": "./lib-esm/index.js",
-      "require": "./lib/index.js"
+      "import": "./lib-esm/index.js"
     },
     "./experimental": {
-      "import": "./lib-esm/experimental/index.js",
-      "require": "./lib/experimental/index.js"
+      "import": "./lib-esm/experimental/index.js"
     },
     "./drafts": {
-      "import": "./lib-esm/drafts/index.js",
-      "require": "./lib/drafts/index.js"
+      "import": "./lib-esm/drafts/index.js"
     },
     "./deprecated": {
-      "import": "./lib-esm/deprecated/index.js",
-      "require": "./lib/deprecated/index.js"
+      "import": "./lib-esm/deprecated/index.js"
     },
     "./lib-esm/*": {
       "import": [
         "./lib-esm/*.js",
         "./lib-esm/*/index.js"
-      ],
-      "require": [
-        "./lib/*.js",
-        "./lib/*/index.js"
       ]
     },
     "./lib-esm/internal/*": null

rollup.config.js → rollup.config.mjs

@@ -56,13 +56,6 @@ const input = new Set([
 ])
 
 const extensions = ['.js', '.jsx', '.ts', '.tsx']
-const ESM_ONLY = new Set([
-  '@github/combobox-nav',
-  '@github/markdown-toolbar-element',
-  '@github/paste-markdown',
-  '@github/relative-time-element',
-  '@lit-labs/react',
-])
 const dependencies = [
   ...Object.keys(packageJson.peerDependencies ?? {}),
   ...Object.keys(packageJson.dependencies ?? {}),
@@ -143,20 +136,6 @@ export default [
     },
   },
 
-  // CommonJS
-  {
-    ...baseConfig,
-    external: dependencies.filter(name => !ESM_ONLY.has(name)).map(createPackageRegex),
-    output: {
-      interop: 'auto',
-      dir: 'lib',
-      format: 'commonjs',
-      preserveModules: true,
-      preserveModulesRoot: 'src',
-      exports: 'auto',
-    },
-  },
-
   // Bundles
   {
     ...baseConfig,