🐛 Improve parse runtime env reading function

packages/env/env.ts

@@ -1,14 +1,6 @@
 import { createEnv } from '@t3-oss/env-nextjs'
 import { z } from 'zod'
-
-declare const window: {
-  __ENV: any
-}
-
-const getRuntimeVariable = (key: string) => {
-  if (typeof window === 'undefined') return process.env[key]
-  return window.__ENV[key]
-}
+import { getRuntimeVariable } from './getRuntimeVariable'
 
 const boolean = z.enum(['true', 'false']).transform((value) => value === 'true')
 

packages/env/getRuntimeVariable.ts

@@ -0,0 +1,10 @@
+declare const window: {
+  __ENV?: any
+}
+
+const isBrowser = () => Boolean(typeof window !== 'undefined' && window.__ENV)
+
+export const getRuntimeVariable = (key: string) => {
+  if (isBrowser()) return window.__ENV[key]
+  return process.env[key]
+}

packages/env/package.json

@@ -15,6 +15,6 @@
     "esbuild": "^0.19.1"
   },
   "scripts": {
-    "build": "esbuild env.ts --packages=external --outfile=dist/env.mjs"
+    "build": "esbuild env.ts --bundle --packages=external --format=esm --outfile=dist/env.mjs"
   }
 }