Remove experimental.pageEnv

packages/next/src/build/webpack-config.ts

@@ -358,22 +358,6 @@ export function getDefineEnv({
           'global.GENTLY': JSON.stringify(false),
         }
       : undefined),
-    // stub process.env with proxy to warn a missing value is
-    // being accessed in development mode
-    ...(config.experimental.pageEnv && dev
-      ? {
-          'process.env': `
-            new Proxy(${isNodeServer ? 'process.env' : '{}'}, {
-              get(target, prop) {
-                if (typeof target[prop] === 'undefined') {
-                  console.warn(\`An environment variable (\${prop}) that was not provided in the environment was accessed.\nSee more info here: https://nextjs.org/docs/messages/missing-env-value\`)
-                }
-                return target[prop]
-              }
-            })
-          `,
-        }
-      : {}),
   }
 }
 
@@ -2720,7 +2704,6 @@ export default async function getBaseWebpackConfig(
     serverActions: config.experimental.serverActions,
     typedRoutes: config.experimental.typedRoutes,
     basePath: config.basePath,
-    pageEnv: config.experimental.pageEnv,
     excludeDefaultMomentLocales: config.excludeDefaultMomentLocales,
     assetPrefix: config.assetPrefix,
     disableOptimizedLoading,

packages/next/src/lib/turbopack-warning.ts

@@ -33,7 +33,6 @@ const supportedTurbopackNextConfigOptions = [
   'experimental.proxyTimeout',
   'experimental.isrFlushToDisk',
   'experimental.workerThreads',
-  'experimenatl.pageEnv',
   'experimental.caseSensitiveRoutes',
 ]
 

packages/next/src/server/config-schema.ts

@@ -387,9 +387,6 @@ const configSchema = {
         outputFileTracingIncludes: {
           type: 'object',
         },
-        pageEnv: {
-          type: 'boolean',
-        },
         proxyTimeout: {
           minimum: 0,
           type: 'number',

packages/next/src/server/config-shared.ts

@@ -175,7 +175,6 @@ export interface ExperimentalConfig {
   proxyTimeout?: number
   isrFlushToDisk?: boolean
   workerThreads?: boolean
-  pageEnv?: boolean
   // optimizeCss can be boolean or critters' option object
   // Use Record<string, unknown> as critters doesn't export its Option type
   // https://github.com/GoogleChromeLabs/critters/blob/a590c05f9197b656d2aeaae9369df2483c26b072/packages/critters/src/index.d.ts
@@ -717,7 +716,6 @@ export const defaultConfig: NextConfig = {
     sharedPool: true,
     isrFlushToDisk: true,
     workerThreads: false,
-    pageEnv: false,
     proxyTimeout: undefined,
     optimizeCss: false,
     nextScriptWorkers: false,