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Next.js 16+ · Module

next/server

In Next.js 16, use connection() before reading server environment variables at request time. Use NEXT_PUBLIC_ variables for values that Client Components need.

Last updated

Since
16

Syntax

await connection();
const value = process.env.RUNTIME_CONFIG;

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  • connection()
  • cacheComponents
  • NEXT_PUBLIC_
  • process.env
  • Suspense
  • experimental.dynamicIO
  • experimental.useCache

Source: How to upgrade to version 16. Checked 2026-11-03.