Module not found: Error: Can't resolve 'core-js/modules/es6.array.iterator' in '/app/.nuxt'

[bimohxh]

Version

v2.4.5

Reproduction link

https://github.com/nuxt/nuxt.js

Steps to reproduce

just remove your node_modules and npm install and npm run build

What is expected ?

build success

What is actually happening?

build error

Module not found: Error: Can't resolve 'core-js/modules/es6.array.iterator' in '/app/.nuxt'
@ ./.nuxt/client.js 15:0-44
@ multi ./.nuxt/client.js�[39m�[22m

�[1m�[31mERROR in ./.nuxt/utils.js
Module not found: Error: Can't resolve 'core-js/modules/es6.date.to-string' in '/app/.nuxt'
@ ./.nuxt/utils.js 6:0-44
@ ./.nuxt/client.js
@ multi ./.nuxt/client.js�[39m�[22m

�[1m�[31mERROR in ./.nuxt/client.js
Module not found: Error: Can't resolve 'core-js/modules/es6.function.name' in '/app/.nuxt'
@ ./.nuxt/client.js 14:0-43
@ multi ./.nuxt/client.js�[39m�[22m

�[1m�[31mERROR in ./.nuxt/index.js
Module not found: Error: Can't resolve 'core-js/modules/es6.function.name' in '/app/.nuxt'
@ ./.nuxt/index.js 6:0-43
@ ./.nuxt/client.js
@ multi ./.nuxt/client.js�[39m�[22m
....

Additional comments?

this maybe caused by babel use core-js@3

babel/babel#7646

https://github.com/babel/babel/releases/tag/v7.4.1

_{This bug report is available on Nuxt community (#c8870)}

[heshamelmasry77]

i hate @CMTY no one answer anything there and not on the search on google :S stop closing issues

[heshamelmasry77]

@bimohxh did you find any solution for it ?

[heshamelmasry77]

any solution for this

[aldarund]

@heshamelmasry77 clean lock file and node modules and resintall, if it dont help -> add core-js@2 at your project

[solonik1]

Same issue with nuxt 2.6.1. "core-js": "^2.6.5" fixed the issue

[aa-ziyi]

yarn add core-js
如果还不行
删除 node_modules,然后使用 yarn 安装，不要使用 cnpm 安装；

[bimohxh]

不要用 cnpm，换成 npm 即可

[yoelnacho]

package.json
"dependencies": { "core-js": "^2.6.5", "nuxt": "2.6.3", ... },

1. delete yarn.lock and node_modules
2. yarn

It works!

[riux]

I just updated the dependencies and I get this error

[nullablebool]

@riux try @yoelnacho answer. I had to yarn add core-js@2.6.10 (v3 does not seem to be supported).

[filrak]

I still got this error. Adding core-js manually is not the best option since it breaks modern build @pi0 any advices?

[thebspin]

Having the same issue on my deployment server..., even adding core-js manually won't work for me.

[janpansa]

We were getting the same issue after doing an npm install. The issue started when we installed file-loader for adding a specific sound file. Thereafter, referted back from using file-loader and uninstalled it. We the started getting the error messages of core-js not resolved.

We added core-js manually, however this installed the latest corejs version (3.x) and did not work.

Had to manually add core-js :

npm install core-js@2.6.10 --save

However, this is very 'hacky' solution since this message appears when installing:

core-js@<3.0 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.

Our project is working now, but for how long untill it is no longer support. It also feels 'hacky' since core-js was never required to be manually installed.

[wanxe]

Same here! Why is this closed? 🤔

[lupas]

I keep getting this error randomly in various long-running projects, usually after upgrading nuxt. Just got it again after upgrading to v2.11.0.

Using npm or yarn, deleting node_modules and the lock file, all did not work except manually installing core-js v2 like mentioned above.

Is there an official solution for this problem? I get it for months now randomly.

[wanxe]

I have only done what they propose here and everything works perfectly in 2.11.0 👍

[agcty]

@wanxe @filrak I solved it by following the steps outlined here: https://www.npmjs.com/package/@nuxt/babel-preset-app#example-2-use-core-js3

In addition, I clean up my nuxt.config.js file by outsourcing the babel config in its own babel.config.js file.

nuxt.config.js

build: {
    babel: {
      configFile: "./babel.config.js"
    }
}

babel.config.js

module.exports = function(api) {
  return {
    presets: [
      [
        "@nuxt/babel-preset-app",
        {
          corejs: { version: 3 }
        }
      ]
    ]
  };
};

[regenrek]

Same here on 2.11 with yarn build. It works with adding core-js but is there any info why it's necessary to add core-js@x ?

[connorhvnsen]

I was having issues using npm. Fix was to remove package.lock, remove node_modules, add "core-js": "^2.6.5" to deps and run yarn install.

[webdawe]

Hey Guys,
After adding "core-js": "^2.6.5" , I am getting error
[Vue warn] The .native modifier for v-on is only valid on components but it was used on .
Please advise.
Anil

[lucasoneves]

I've deleted the yarn-lock.json file and i ran "yarn" again. It worked.

[iansamz]

I noticed the error occured when i upgraded some dependecies like bootstrap-vue from 2.0.0 to 2.9.0 and nuxt from 2.0.0 to 2.12.1
yarn add core-js@2 did the trick

[skflowne]

Getting the same error after adding firebase

Removing node_modules then yarn did not work

yarn add core-js@2 worked though

[liberticoding]

why there no core team answering this problems, like where are they, they supposed to helps us, not to let us fighting this error, I am disappointed

[jjangga0214]

Guys, following the docs resolved the issue: https://nuxtjs.org/guide/release-notes#v2.6.0

yarn add -D core-js@3 @babel/runtime-corejs3
# or
npm i -D core-js@3 @babel/runtime-corejs3

Then edit nuxt.config.js.

export default {
  build: {
    babel: {
      presets({ isServer }) {
        return [
          [
            require.resolve('@nuxt/babel-preset-app'),
            // require.resolve('@nuxt/babel-preset-app-edge'), // For nuxt-edge users
            {
              buildTarget: isServer ? 'server' : 'client',
              corejs: { version: 3 }
            }
          ]
        ]
      }
    }
  }
}

[kendalled]

Can verify @jjangga0214 solution works. Thank you.

[isuke01]

After install core-js@3 @babel/runtime-corejs3 my PM2 Just break :/

[lupas]

@isuke01
https://nuxtjs.org/guide/release-notes#core-js
Install Core JS v2, not 3

[1998code]

Getting the same error after adding firebase

Removing node_modules then yarn did not work

yarn add core-js@2 worked though

Thank you! Works :)

[MarcelloTheArcane]

It's still not ideal:

warning core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.

[richardeschloss]

yeah, I just encountered this issue too :/

[lil-armstrong]

Guys, follow the docs to resolve the issue: https://nuxtjs.org/guide/release-notes#v2.6.0

yarn add -D core-js@3 @babel/runtime-corejs3
# or
npm i -D core-js@3 @babel/runtime-corejs3

Then edit nuxt.config.js.

export default {
  build: {
    babel: {
      presets({ isServer }) {
        return [
          [
            require.resolve('@nuxt/babel-preset-app'),
            // require.resolve('@nuxt/babel-preset-app-edge'), // For nuxt-edge users
            {
              buildTarget: isServer ? 'server' : 'client',
              corejs: { version: 3 }
            }
          ]
        ]
      }
    }
  }
}

Solution works

[richardeschloss]

Hi @lil-armstrong thanks for the links! I appreciate it!

[1isten]

For me I encountered this issue after I upgrade some dependencies using yarn add xxx@latest. I solved this by running npm install after the upgrading (without deleting yarn.lock or package-lock.json). I think this issue may be related to yarn..

Edit: @jjangga0214 is right. Just checkout which version of core-js has been installed in the node_modules and specify the actual core-js version in build.babel in nuxt.config.js. Since Nuxt 2.6 it supports both v2 and v3 of core-js. But by default it's v2 so if any dependency causes v3 installed you have to tell Nuxt through that config option.

[AndrewBogdanovTSS]

if you are using Yarn you can add resolutions to your package.json like so

"resolutions": {
    "core-js": "2.6.11"
  }

[sabih1996]

Same issue with nuxt 2.6.1. "core-js": "^2.6.5" fixed the issue

how did you fixit?

[TaoHuaXia]

remove node_modules and lock file then install dosen't work, but npm install core-js@2 works

[ghtali]

Simple and painless solution. Just add or update core-js.

for npm:

npm i -S core-js@2.5.7

for yarn:

yarn add core-js@2.5.7