Error: "defuFn is not a function" in 3.0.0-rc.9-xx

[linooohon]

Environment

---

• Operating System: MacOS
• Node Version: v16.17.0
• Nuxt Version: 3.0.0-rc.9-27702110.abd5dc5
• Package Manager: [email protected]
• Bundler: Vite
• User Config: -
• Runtime Modules: -
• Build Modules: -

---

Reproduction

package.json

  "dependencies": {
    "@headlessui/vue": "^1.6.7",
    "@heroicons/vue": "^1.0.6",
    "nuxt": "npm:nuxt3@^3.0.0-rc.9-27702110.abd5dc5",
    "pinia": "^2.0.21",
    "primeicons": "^5.0.0",
    "primevue": "^3.15.0",
    "vue": "^3.2.37"
  }

Describe the bug

When trying to fix loading problem of resources (ex: js files..) to follow cdnURL path with the version 3.0.0-rc.9-27702110.abd5dc5, and the resources loading problem was solved perfectly, thank you!

But there was an error with:

__vite_ssr_import_0__.defuFn is not a function

Temp Solution:

I solved it with adding defu dependencies "defu": "^6.1.0" in package.json for now.

npm i defu

Has anyone run into the same problem? Or other solutions? Thank you!

Additional context

No response

Logs

No response

[HomWang]

Would you please prodive a reproduction?

[pxtrez]

same here but installing defu doesn't help

[ghost]

same here with [email protected] and @[email protected]

[TheAlexLichter]

same here with [email protected] and @[email protected]

Instead of "same here", please provide a reproduction if the "needs reproduction" label is visible. Feel free to use the starter from https://nuxt.new/

[lucassimines]

I'm experiencing the same issue and trying to find the error to create a reproduction. But installing defu for now solved the issue.

[Joaojack]

Same thing here. I understand you're asking for a reproduction, but it's a big project and evrything created from scratch would not reflect it. My project worked with rc8, and I have this error message with rc9 when doing npm run dev. Could you at least explain the meaning of the error message to do our own research if you don't want to help without reproduction ? Thanks

[nuxt] [request error] [unhandled] [500] __vite_ssr_import_0__.defuFn is not a function
  at ./.nuxt/app.config.mjs:9:54  
  at processTicksAndRejections (node:internal/process/task_queues:96:5)  
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)  
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)  
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)  
  at async ./node_modules/nuxt/dist/app/config.mjs:5:31  
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)  
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)  
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)  
  at async ./node_modules/nuxt/dist/app/index.mjs:7:31

[Joaojack]

Kind of "good" news : after many tries on my project, I just launched a new empty project with nuxi init and the problem appears the same way ! @danielroe So is it something more hardware or os related ? @lucassimines on which Os are you ?

nuxi version : Nuxi 3.0.0-rc.9 node version v16.13.1 npm version 8.19.1 MacBook Air / Apple M1 / 8Go on Monterey 12.4

[Erica-lyj]

after rc.8 upgrade to rc.9 ，npm run dev vuex similar error occurred

[Erica-lyj]

after rc.8 upgrade to rc.9 ，npm run dev vuex similar error occurred

[nuxt] [request error] [unhandled] [500] __vite_ssr_import_0__.createStore is not a function
  at C:/project/nuxt-test/website-mobile/store/index.ts:5:37
  at async ViteNodeRunner.directRequest (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:217:5)
  at async ViteNodeRunner.cachedRequest (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:113:12)
  at async request (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:136:16)
  at async C:/project/nuxt-test/website-mobile/pages/buyin.vue?macro=true:11:31
  at async ViteNodeRunner.directRequest (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:217:5)
  at async ViteNodeRunner.cachedRequest (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:113:12)
  at async request (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:136:16)
  at async virtual:nuxt:C:/project/nuxt-test/website-mobile/.nuxt/routes.mjs:1:238
  at async ViteNodeRunner.directRequest (/C:/project/nuxt-test/website-mobile/node_modules/vite-node/dist/client.mjs:217:5)

[Joaojack]

Not theexact same error msg @Erica-lyj , different issue I'm afraid ?

[Joaojack]

Update : I confirm the problem only occurs on Mac. Same repo, same update made on my windows 10 computer, no error.

[ArmadOon]

im creating brand new project with npx nuxi init <Project-name> and when i run npm run dev same problem happen. Im on mac

[Raduc4]

Same issue, Fedora Node v16.14.0

npm init vite my-project -> Nuxt project

Barebone project fails

Nuxi 3.0.0-rc.9                                                                                                                                    20:42:04
Nuxt 3.0.0-rc.9 with Nitro 0.5.1                                                                                                                   20:42:04
                                                                                                                                                   20:42:06
  > Local:    http://localhost:3000/ 
  > Network:  http://192.168.100.44:3000/
  > Network:  http://172.24.0.1:3000/

ℹ Vite client warmed up in 766ms                                                                                                                   20:42:08
ℹ Vite server warmed up in 270ms                                                                                                                   20:42:08
✔ Nitro built in 730 ms                                                                                                                      nitro 20:42:09
[nuxt] [request error] [unhandled] [500] __vite_ssr_import_0__.defuFn is not a function
  at ./.nuxt/app.config.mjs:9:54  
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)  
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)  
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)  
  at async ./node_modules/nuxt/dist/app/config.mjs:5:31  
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)  
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)  
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)  
  at async ./node_modules/nuxt/dist/app/index.mjs:7:31  
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)

[pxtrez]

Update : I confirm the problem only occurs on Mac. Same repo, same update made on my windows 10 computer, no error.

The problem also exists on windows 11

[Joaojack]

Stuck for two days here. Rolled back to rc8, wished i rolled back to Nuxt 2 for my project...

[iDSeGe]

I have also had the same error since today. I have just recreated the project and have not made any changes to the standard.

`$ nuxt dev -o

Nuxi 3.0.0-rc.9 16:38:57 Nuxt 3.0.0-rc.9 with Nitro 0.5.1 16:38:57 16:38:58

Local: http://localhost:3000/ Network: http://192.168.0.170:3000/

ℹ Vite client warmed up in 301ms 16:38:59 ℹ Vite server warmed up in 72ms 16:38:59 ✔ Nitro built in 205 ms nitro 16:38:59 [nuxt] [request error] [unhandled] [500] vite_ssr_import_0.defuFn is not a function at ./.nuxt/app.config.mjs:9:54
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
at async request (./node_modules/vite-node/dist/client.mjs:136:16)
at async ./node_modules/nuxt/dist/app/config.mjs:5:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
at async request (./node_modules/vite-node/dist/client.mjs:136:16)
at async ./node_modules/nuxt/dist/app/index.mjs:7:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5) [nuxt] [request error] [unhandled] [500] vite_ssr_import_0.defuFn is not a function at ./.nuxt/app.config.mjs:9:54
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
at async request (./node_modules/vite-node/dist/client.mjs:136:16)
at async ./node_modules/nuxt/dist/app/config.mjs:5:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
at async request (./node_modules/vite-node/dist/client.mjs:136:16)
at async ./node_modules/nuxt/dist/app/index.mjs:7:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)`

[MerlinPerrotLegler]

Same issue, only removed the the node_modules folder and changed to "nuxt": "3.0.0-rc.8" in the package.json. And it works back again :)

[gpicron]

Same issue.

On Mac (Intel),

Happened just after I made a npm -g upgrade, then created a brand new with npx nuxi init -t doc-driven ui. I'm using brew too, it caused issues in the past with npm global package (maybe a track).

[Joaojack]

Wow @gpicron what you wrote is a huge deal : I've uninstalled homebrew on my Mac, and now rc9 works and the defuFn error message is gone ! That's not a complete solution and doesn't explain what the problem was, but I take it.

[mobayen]

I have same issue on a fresh Nuxt RC9. No extra packages just :

1. npx nuxi init nuxt-app
2. npm install
3. npm run dev

I tried yarn too

[JagrutiPancham]

just write ssr: false in nuxt.config.ts

[Joaojack]

just write ssr: false in nuxt.config.ts

...Except if you want server side rendering 🙃

[joseph-montanez]

just write ssr: false in nuxt.config.ts

Doesnt fix it, just pushed the problem to the client: Here is what you get in the console of a web browser instead.

app.config.mjs:2 Uncaught SyntaxError: The requested module '/_nuxt/node_modules/.vite/deps/defu.js?v=5440456e' does not provide an export named 'defuFn' (at app.config.mjs:2:10)

[joseph-montanez]

I was able to track down the issue to not Nuxt specially but using including @nuxtjs/axios breaks it. Here is my repo to reproduce the issue:

https://github.com/joseph-montanez/nuxt-framework-issue-7168

npm i
npm run dev

Then go to http://localhost:3000/ and you'll get:

500
__vite_ssr_import_0__.defuFn is not a function

at ./.nuxt/app.config.mjs:9:54
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:251:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:128:12)
at async request (./node_modules/vite-node/dist/client.mjs:151:16)
at async ./node_modules/nuxt/dist/app/config.mjs:5:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:251:5)
at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:128:12)
at async request (./node_modules/vite-node/dist/client.mjs:151:16)
at async ./node_modules/nuxt/dist/app/index.mjs:7:31
at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:251:5)

Update: I've added a Docker instance:

docker compose up -d

Then go to http://localhost:3000/

So this isn't a MacOS issue, maybe something related to ArmV8?

[arafays]

It's kind of frustrating seeing it tagged need reproduction when the only commands I have run are

Operating system: Windows 10 x64 Node version: 16.14.2

npx nuxi init app
yarn install
yarn dev

and then you spend hours figuring out where you went wrong and find the issue that is 10 days old

i Vite server warmed up in 1127ms
i Vite client warmed up in 3697ms
√ Nitro built in 1747 ms
[nuxt] [request error] [unhandled] [500] __vite_ssr_import_0__.defuFn is not 
a function
  at./.nuxt/app.config.mjs:9:54
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)
  at async./node_modules/nuxt/dist/app/config.mjs:5:31
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)
  at async ViteNodeRunner.cachedRequest (./node_modules/vite-node/dist/client.mjs:113:12)
  at async request (./node_modules/vite-node/dist/client.mjs:136:16)
  at async./node_modules/nuxt/dist/app/index.mjs:7:31
  at async ViteNodeRunner.directRequest (./node_modules/vite-node/dist/client.mjs:217:5)

[TheAlexLichter]

It's kind of frustrating seeing it tagged need reproduction when the only commands I have run are

You already showcased the problem quite well. The commands you have to run. Just because the issue pops up for you (and a hand full of people), it doesn't mean it is easy to reproduce 🙈 Actually it is quite the opposite.

I tried doing exactly what you wrote and do not receive any errors. 😅

---

Suggestions / Workarounds to try

Some ideas that could help:

• Ensure you don't have a Nuxt2-only module installed
• Install defu manually (e.g. yarn add defu / npm i defu)
• Try out another package manager, e.g. pnpm with pnpm i --shamefully-hoist, then pnpm dev.

[Joaojack]

I solved the problem in my case just by doing one thing (even if that sounds weird) :

• Uninstall homebrew on my mac
• Upgrading nuxt
• Reinstalling homebrew (because i need it)

[joseph-montanez]

Just because the issue pops up for you (and a hand full of people), it doesn't mean it is easy to reproduce 🙈 Actually it is quite the opposite.

I've provided a Github Repo that produces the issue 100% of the time:

https://github.com/joseph-montanez/nuxt-framework-issue-7168

npm i npm run dev

Installing Nuxt on its own works fine, its when its combined with a library. I've tried this on my Linux, two Windows 10 and two Mac Mini's (Intel and M1). They all exhibit the same issue. I did add a docker instance but its not working at the moment.

[TheAlexLichter]

Just because the issue pops up for you (and a hand full of people), it doesn't mean it is easy to reproduce 🙈 Actually it is quite the opposite.

I've provided a Github Repo that produces the issue 100% of the time:

joseph-montanez/nuxt-framework-issue-7168

npm i npm run dev

Installing Nuxt on its own works fine, its when its combined with a library. I've tried this on my Linux, two Windows 10 and two Mac Mini's (Intel and M1). They all exhibit the same issue. I did add a docker instance but its not working at the moment.

It can be reproduced that way 👏🏻

@joseph-montanez But why is @nuxtjs/axios included? It is a Nuxt2 module 🤔

When removing it from package.json and recreate lockfile, things work accordingly 👍🏻

[todpale]

@joseph-montanez But why is @nuxtjs/axios included? It is a Nuxt2 module 🤔

When removing it from package.json and recreate lockfile, things work accordingly 👍🏻

I had the same issue. Nuxt 3 RC 10, I just removed @nuxtjs/axios and installed Defu. Now it works like a charm.