[NEXT-1236] next@13.4.3 next/config return undefined with custom server #50315
Description
Verify canary release
- I verified that the issue exists in the latest Next.js canary release
Provide environment information
Operating System:
Platform: darwin
Arch: arm64
Version: Darwin Kernel Version 22.4.0: Mon Mar 6 20:59:28 PST 2023; root:xnu-8796.101.5~3/RELEASE_ARM64_T6000
Binaries:
Node: 18.16.0
npm: 9.5.1
Yarn: 1.22.10
pnpm: 8.5.1
Relevant packages:
next: 13.4.4-canary.9
eslint-config-next: 13.4.3
react: 18.2.0
react-dom: 18.2.0
typescript: 5.0.4Which area(s) of Next.js are affected? (leave empty if unsure)
No response
Link to the code that reproduces this issue or a replay of the bug
https://github.com/yceffort/next-config-bug
To Reproduce
npm i && npm run build && npm run start// next.config.js
/** @type {import('next').NextConfig} */
const nextConfig = {
serverRuntimeConfig: {
'hello': 'world'
},
publicRuntimeConfig: {
'foo': 'bar'
}
}
module.exports = nextConfig// server.ts
import next from 'next'
import Koa from 'koa'
import mount from 'koa-mount'
import getConfig from "next/config";
async function main() {
const nextApp = next({dev: false})
await nextApp.prepare()
const nextAppHandler = nextApp.getRequestHandler()
const app = new Koa()
const config = getConfig()
console.log("config >>>>>>>>>>>", config) // undefined
app.use(
mount('/', (ctx) => {
ctx.respond = false
nextAppHandler(ctx.req, ctx.res)
}),
)
app.listen(3000)
}
main()Describe the Bug
In version 13.4.3 of next, when running with a custom server, next/config returns undefined. This was fine in previous versions.
» npm i && npm run build && npm run start
changed 3 packages, and audited 355 packages in 4s
126 packages are looking for funding
run `npm fund` for details
found 0 vulnerabilities
> config@0.1.0 build
> tsc -p tsconfig.server.json && next build --debug
- info Creating an optimized production build
- info Compiled successfully
- info Linting and checking validity of types
- info Collecting page data
- info Generating static pages (4/4)
- info Finalizing page optimization
Route (app) Size First Load JS
┌ ○ / 4.95 kB 127 kB
└ ○ /favicon.ico 0 B 0 B
+ First Load JS shared by all 122 kB
├ chunks/2443530c-d4a6bd7fc7f21e3c.js 50.5 kB
├ chunks/488-441ec15fc214c3f1.js 24.7 kB
├ chunks/framework-6f53985fc108c1c2.js 45.1 kB
├ chunks/main-app-2bfe5c03c0626a2e.js 220 B
└ chunks/webpack-a71e0afe4755ac1d.js 1.68 kB
Route (pages) Size First Load JS
─ ○ /404 181 B 74.8 kB
+ First Load JS shared by all 74.6 kB
├ chunks/framework-6f53985fc108c1c2.js 45.1 kB
├ chunks/main-ee95a2f67a80a342.js 27.6 kB
├ chunks/pages/_app-b555d5e1eab47959.js 195 B
└ chunks/webpack-a71e0afe4755ac1d.js 1.68 kB
○ (Static) automatically rendered as static HTML (uses no initial props)
Redirects
┌ source: /:path+/
├ destination: /:path+
└ permanent: true
> config@0.1.0 start
> node dist/server.js
# unexpected behaviour
config >>>>>>>>>>> undefinedExpected Behavior
It should return serverRuntimeConfig and publicRuntimeConfig.
# 13.4.2
~/private/config main ✗ 130 ⚠️
» npm i && npm run build && npm run start
changed 3 packages, and audited 355 packages in 5s
126 packages are looking for funding
run `npm fund` for details
found 0 vulnerabilities
> config@0.1.0 build
> tsc -p tsconfig.server.json && next build --debug
- info Creating an optimized production build
- info Compiled successfully
- info Linting and checking validity of types
- info Collecting page data
- info Generating static pages (4/4)
- info Finalizing page optimization
Route (app) Size First Load JS
┌ ○ / 4.93 kB 81.9 kB
└ ○ /favicon.ico 0 B 0 B
+ First Load JS shared by all 76.9 kB
├ chunks/139-bbae89bf9cd2e4a9.js 24.5 kB
├ chunks/2443530c-d4a6bd7fc7f21e3c.js 50.5 kB
├ chunks/main-app-ca1f37152f50a304.js 215 B
└ chunks/webpack-a71e0afe4755ac1d.js 1.68 kB
Route (pages) Size First Load JS
─ ○ /404 178 B 86 kB
+ First Load JS shared by all 85.8 kB
├ chunks/main-ec7b1d67e0a9d0ca.js 83.9 kB
├ chunks/pages/_app-c544d6df833bfd4a.js 192 B
└ chunks/webpack-a71e0afe4755ac1d.js 1.68 kB
○ (Static) automatically rendered as static HTML (uses no initial props)
Redirects
┌ source: /:path+/
├ destination: /:path+
└ permanent: true
> config@0.1.0 start
> node dist/server.js
# works fine in 13.4.2
config >>>>>>>>>>> {
serverRuntimeConfig: { hello: 'world' },
publicRuntimeConfig: { foo: 'bar' }
}Which browser are you using? (if relevant)
No response
How are you deploying your application? (if relevant)
No response