TypeError: Cannot destructure property 'Server' of '_engineIo.default'

[richardeschloss]

Describe the bug
A clear and concise description of what the bug is.

In a library I've written, when I attempt to import from "socket.io", I encounter an error "TypeError: Cannot destructure property 'Server' of '_engineIo.default'. I am able to fix this by updating the first line in wrapper.mjs:

import * as lib from "./build/engine.io.js"; // instead of: import lib from "./build/engine.io.js", which assumes a default export

Please let me know if you'd be open to the proposed change. I can submit the PR if you'd like.

Linked issue: https://github.com/richardeschloss/nuxt-socket-io/issues/278

[darrachequesne]

Hi! Unfortunately I'm not able to reproduce the issue, either with TS/plain JS or CJS/ESM imports.

Could it be linked to nuxt/nuxt#14790?

Note: the current wrapper matches the documentation there: https://nodejs.org/docs/latest-v16.x/api/packages.html#approach-1-use-an-es-module-wrapper

[richardeschloss]

Ok. Let's keep this issue open for the time being. It's possibly a Nuxt issue (which now uses jiti, which contains a bit more context unjs/jiti#87).

Reproduction

Install nuxt3 latest (rc12) with npm install nuxt@npm:nuxt3@latest (NOTE: Nuxt3 is still not stable).

The way to reproduce is, inside a minimal Nuxt project, create a module, say "lib/module.js", use the following config:

export default defineNuxtConfig({
  modules: [ './lib/module.js']
  build: {
    // transpile: ['engine.io'] // doesn't help
  }
})

Inside "./lib/module.js":

import { Server } from 'socket.io'
console.log(Server) // should print to the console

npm run dev # runs "nuxi dev"

Result

TypeError: Cannot destructure property 'Server' of '_engineIo.default'

[u-hafner]

I have the same problem with nuxt stable version. Is there any way currently to work around this problem?

[TheOfficialDaveyDave]

I did a research, so far I've seen none.

[darrachequesne]

This should be fixed by ed87609, included in version 6.3.0. We'll release a new version of socket.io soon.

Please reopen if needed.