Q: How to fix: "DeprecationWarning: `punycode` module is deprecated."

[Magnus Sörensen]

Kind of Issue

Runtime - command-line tools

Tool or Library

cspell

Version

6.31.1

Supporting Library

Not sure

OS

Linux

OS Version

Archlinux

Description

Hi.
I just wanted to test cspell on a markdown file but i got this report.

$ cspell --locale=sv your_test_file.md

(node:294824) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
CSpell: Files checked: 0, Issues found: 0 in 0 files

I tested the node trace option like below:

$ node --trace-deprecation /usr/bin/cspell --locale=en your_test_file.md

(node:297520) [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:397:7)
    at BuiltinModule.compileForPublicLoader (node:internal/bootstrap/realm:333:10)
    at loadBuiltinModule (node:internal/modules/helpers:101:7)
    at Module._load (node:internal/modules/cjs/loader:1001:17)
    at Module.require (node:internal/modules/cjs/loader:1235:19)
    at require (node:internal/modules/helpers:176:18)
    at Object.<anonymous> (/usr/lib/node_modules/cspell/node_modules/whatwg-url/lib/url-state-machine.js:2:18)
    at Module._compile (node:internal/modules/cjs/loader:1376:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1435:10)
CSpell: Files checked: 0, Issues found: 0 in 0 files

Is that some thing known or did I do something wrong?
Best regards.
/Magnus Sörensen

Steps to Reproduce

$ cspell --locale=sv your_test_file.md
$ node --trace-deprecation /usr/bin/cspell --locale=en your_test_file.md

Expected Behavior

Expected to get a warning of a spelling error or something like that.

Additional Information

No response

cspell.json

No response

cspell.config.yaml

No response

Example Repository

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[Jason Dent]

@byteofsoren,

The warning is coming from NodeJS v21. Searching for: DeprecationWarning: The punycode module is deprecated - Google Search shows this issue popping up for a lot of tools.

Even though CSpell does not use punycode directly, it gets imported through cspell -> node-fetch -> whatwg-url -> tr46 -> punycode

There are a few options:

• Update to CSpell v8, the warning will go away since it doesn't use node-fetch.
• Use Node version less than v21
• Use a patch utility (like patch-package - npm) to change tr46 as described in node.js - punycode is deprecated in npm - what should I replace it with? - Stack Overflow

  Then in node_modules go to the directory tr46 > index.js

  // Replace this:
  const punycode = require('punycode');
  // With this:
  const punycode = require('punycode/');

[github-actions]

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