vue ui not working

[seijikohara]

Version

3.4.0

Environment info

Environment Info:

  System:
    OS: macOS 10.14.2
    CPU: (8) x64 Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
  Binaries:
    Node: 11.9.0 - /usr/local/bin/node
    Yarn: Not Found
    npm: 6.7.0 - /usr/local/bin/npm
  Browsers:
    Chrome: 71.0.3578.98
    Firefox: 64.0
    Safari: 12.0.2
  npmPackages:
    @vue/cli:  3.4.0
  npmGlobalPackages:
    @vue/cli: 3.4.0

Steps to reproduce

vue ui command does not start with an error.

$ vue ui
internal/modules/cjs/loader.js:611
    throw err;
    ^

Error: Cannot find module 'core-js/proposals/array-flat-and-flat-map'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:609:15)
    at Function.Module._load (internal/modules/cjs/loader.js:535:25)
    at Module.require (internal/modules/cjs/loader.js:663:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/@vue/cli/node_modules/apollo-env/lib/polyfills/array.js:3:1)
    at Module._compile (internal/modules/cjs/loader.js:734:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:745:10)
    at Module.load (internal/modules/cjs/loader.js:626:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:566:12)
    at Function.Module._load (internal/modules/cjs/loader.js:558:3)

What is expected?

vue ui will start without errors.

What is actually happening?

Necessary modules are missing.

[larsmars]

I have the same, just updated vue cli.

vue --version = 3.4.0
macOS Mojave 10.14.2
node v10.14.1
yarn 1.5.1
npm 6.7.0

[mnewt00]

Yeah I have the same error as well, trying to find a fix

[Kerbores]

me too

[Kerbores]

~ vue -V
3.4.0
➜ ~ npm -v
6.4.1
➜ ~ node -v
v10.15.1
➜ ~ vue ui
internal/modules/cjs/loader.js:583
throw err;
^

Error: Cannot find module 'core-js/proposals/array-flat-and-flat-map'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object. (/usr/local/lib/node_modules/@vue/cli/node_modules/apollo-env/lib/polyfills/array.js:3:1)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)

[iAn-Pinto]

me too, same error:

vue --version is 3.4.0
macOS Mojave 10.14.1 (18B75)
node --version is v11.9.0
npm --version is 6.5.0

vue ui

internal/modules/cjs/loader.js:583
throw err;
^

Error: Cannot find module 'core-js/proposals/array-flat-and-flat-map'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
at Function.Module._load (internal/modules/cjs/loader.js:507:25)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object. (/usr/local/lib/node_modules/@vue/cli/node_modules/apollo-env/lib/polyfills/array.js:3:1)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)

[sadeghbarati]

+1

reinstall every thing like vue-cli node core-js but still have problem

remove npm and npm-cache

remove node_module in user/AppData/Roaming and reinstall every thing and still have problem

node v10.15.1
npm v6.4.1
vue v3.4.0

😢 😭

[haoqunjiang]

It’s a bug in apollo-env

[sadeghbarati]

@sodatea what should we do ?!

[haoqunjiang]

They depend on a beta version of core-js without locking its version.
And core-js’s directory structure just got changed due to the release of ES2019 standard.
zloirock/core-js@f9bb4c1

[haoqunjiang]

apollographql/apollo-tooling#961

[sadeghbarati]

Let us know when the bug was fixed , thanks 👍

[wangwenyin]

怎么修复呢？安装3.0低版本的cli？

[wangwenyin]

you guys can try：npm install -g core-js@3.0.0-beta.11 ，it's work for me!

[mnewt00]

Wow, thank you so much @wangwenyin it works now

[bellsenawat]

I try yarn global add core-js@3.0.0-beta.3 and it's work !!!

[dousybox]

Seems apollo-env has fixed this problem in apollographql/apollo-tooling#962 (comment)
Try npm i -g @vue/cli reinstall vue cli to update the dependencies, and vue ui work fine

[seijikohara]

This issue has been resolved. Thanks!

$ npm install -g @vue/cli && vue ui
npm WARN deprecated cross-spawn-async@2.2.5: cross-spawn no longer requires a build toolchain, use it instead
/usr/local/bin/vue -> /usr/local/lib/node_modules/@vue/cli/bin/vue.js
+ @vue/cli@3.4.0
updated 1 package in 4.664s
🚀  Starting GUI...
🌠  Ready on http://localhost:8000

[MCYouks]

After trying all the different solutions proposed above, it seems that removing the node_modules and then running npm build worked for me!