engine.io 6.6.3 syntax error issue with downstream cookie package in latest update - Gulp/Npm/Node JS compiler.

[freonirons409]

Describe the bug
When running Gulp with browsersync, the latest build of engine.io throws the following errors that appear in the downstream cookie dependency:

/<PATH>/node_modules/engine.io/node_modules/cookie/dist/index.js:83
    const dec = options?.decode || decode;
                        ^
SyntaxError: Unexpected token '.'
    at wrapSafe (internal/modules/cjs/loader.js:915:16)
    at Module._compile (internal/modules/cjs/loader.js:963:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/<PATH>/node_modules/engine.io/build/server.js:11:18)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)

To Reproduce
Run a node JS instance using gulp with latest version of engine.io. Reverting back to 6.6.2 resolves the issue completely.

Socket.IO server version: 4.8.1
Engine.IO dependency version: 6.6.3

Expected behavior
Successful build completion using gulp, NPM, Node JS
Gulp: 4.0
Node: 20.22
NPM: 10

Platform:

• Device: All devices
• OS: MacOS 15.2, ChromeOS 131.0.6778.241,

[ipmincubus1369]

One more issue with 6.6.3 - it is pulling in cookie@~1.0.2, which requires node version >= 18, this is breaking for all environment under 18.

[sara1528]

I'm getting these same errors, I currently cannot upgrade node, and now I cannot run my karma tests, as they depend on socket.io which is broken because of this issue,
hope it will be fixed soon

[rhgoddard]

Also seeing this issue, and the only way we can get beyond it to use BrowserSync is to run:
npm install [email protected] --save-dev

[darrachequesne]

cookie has been reverted to version ~0.7.2 in 5a31aaf, released in [email protected].

Could you please check?

[ipmincubus1369]

Yes, issue fixed now. Thank!

[philippe-granet]

I confirm, issue fixed now!

[darrachequesne]

Great, thanks for the heads-up 👍