Laravel-mix: Unable to find module 'uglifyjs-webpack-plugin'

[ellisio]

• Laravel Mix Version: 2.0.0
• Node Version (node -v): 9.4.0
• NPM Version (npm -v): 5.6.0
• OS: macOS 10.12.6

Description:

When running npm run dev I receive the following error:

module.js:557
    throw err;
    ^

Error: Cannot find module 'uglifyjs-webpack-plugin'
    at Function.Module._resolveFilename (module.js:555:15)
    at Function.Module._load (module.js:482:25)
    at Module.require (module.js:604:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/anellis/Developer/TextLoop/node_modules/laravel-mix/src/builder/webpack-plugins.js:9:22)
    at Module._compile (module.js:660:30)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)

Steps To Reproduce:

Using the following webpack.mix.js running the latest version of Laravel Mix results in this error.

let mix = require('laravel-mix');

mix
    .js('resources/assets/js/admin/app.js', 'public/js/admin')
    .js('resources/assets/js/agent/app.js', 'public/js/agent')
    .sass('resources/assets/sass/app.scss', 'public/css')
    .sass('resources/assets/sass/collector.scss', 'public/css');

I tried running the following to ensure a clean working slate:

rm -rf node_modules
npm cache clear --force
npm install

No luck.

Installed packages:

├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── @fortawesome/[email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
└── [email protected]

[Kinomej]

There seems to be a problem with the latest version of the uglifyjs-webpack-plugin
https://github.com/webpack-contrib/uglifyjs-webpack-plugin/issues/217

Downgrading seems to fix it.

npm i --save-dev [email protected]

[ellisio]

Thank you @Nekura. I would say leave this open until the dependency is fixed so others experiencing this issue see this for the temporary work around.

[v1ncen]

Upgrading to 1.1.8 fixed it too for me.

npm i --save-dev [email protected]

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.