Node.js 22: "[DEP0040] DeprecationWarning: The `punycode` module is deprecated."

[MikeMcC399]

• This issue follows on from https://github.com/vercel/serve/issues/789

Description

Running serve under Node.js 22.x version causes a deprecation notice similar to the following to be displayed:

$ serve -v (node:3752) [DEP0040] DeprecationWarning: The punycode module is deprecated. Please use a userland alternative instead. (Use node --trace-deprecation ... to show where the warning was created) 14.2.2

Node.js v22.0.0 (Current) was released on Apr 24, 2024.

Steps to reproduce

On Ubuntu 22.04.4 LTS with Node.js v22.0.0

npm install serve@latest -g
export NODE_OPTIONS='--trace-deprecation'
serve -v

shows

$ serve -v
(node:4155) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
    at node:punycode:3:9
    at BuiltinModule.compileForInternalLoader (node:internal/bootstrap/realm:398:7)
    at BuiltinModule.compileForPublicLoader (node:internal/bootstrap/realm:337:10)
    at loadBuiltinModule (node:internal/modules/helpers:113:7)
    at Module._load (node:internal/modules/cjs/loader:1053:17)
    at Module.require (node:internal/modules/cjs/loader:1290:19)
    at require (node:internal/modules/helpers:188:18)
    at Object.<anonymous> (/home/mike/n/lib/node_modules/serve/node_modules/fast-url-parser/src/urlparser.js:401:16)
    at Module._compile (node:internal/modules/cjs/loader:1455:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1534:10)
14.2.2

Library version

14.2.2 and 14.2.3

Node version

v22.0.0 and v22.5.1

[MikeMcC399]

• This issue and https://github.com/vercel/serve-handler/issues/204 need to be resolved before Node.js 22.x enters Active LTS status on Oct 29, 2024 (see Release Schedule). If not, I would plan to migrate away from using serve.

[nemanjacosovic]

Probably not worth the mention, but yes it's present in node v22.5.0.

(node:96621) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

[MikeMcC399]

@nemanjacosovic

I've updated the original posting with the latest versions serve 14.2.3 / Node.js v22.5.1.

[MikeMcC399]

• https://github.com/vercel/serve-handler/issues/204 is now resolved. This needs a new release to follow the current latest [email protected] from Nov 2022, as noted in https://github.com/vercel/serve-handler/pull/207#issuecomment-2413436282
• This would need a change is this repo as well since [email protected] is explicitly called out by [email protected]

https://github.com/vercel/serve/blob/d06104a2de569b1bef57f567f853ab3cfd0024e4/package.json#L47

[MikeMcC399]

• See https://github.com/vercel/serve/pull/812 for resolution