Cannot find module 'webpack-cli' - firebase

Question

I want to make es6 into my project so I used this tutorial this tutorial
and when i try to write 'webpack' in cmd I get the error
Done in 8.99s.
{ Error: Cannot find module 'webpack-cli'
at Function.Module._resolveFilename (module.js:470:15)
at Function.Module._load (module.js:418:25)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at runCommand.then.result (C:\Users\adirz\AppData\Roaming\npm\node_modules\webpack\bin\webpack.js:62:14)
at process._tickCallback (internal/process/next_tick.js:109:7) code: 'MODULE_NOT_FOUND' }
package.json
{
"name": "functions",
"scripts": {
"build": "tsc",
"serve": "npm run build && firebase serve --only functions",
"shell": "npm run build && firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"main": "lib/index.js",
"dependencies": {
"firebase-admin": "~5.12.0",
"firebase-functions": "^1.0.1"
},
"devDependencies": {
"ts-loader": "^4.2.0",
"typescript": "^2.5.3",
"webpack": "^4.5.0",
"webpack-cli": "^2.0.14",
"webpack-node-externals": "^1.7.2"
},
"private": true
}
my folder structure

Answer 1

Try using: npm i -g webpack-cli.
Here is the official issue on github: https://github.com/webpack/webpack-cli/issues/191

Answer 2

Link globally installed package to your project
npm link webpack-cli

Answer 3

This solved the problem for me
sudo chown -R $USER /usr/local/lib/node_modules
npm i -g webpack-cli
https://flaviocopes.com/npm-fix-missing-write-access-error/

Answer 4

The problem for me it was that I was not using 'sudo' permissions.
If you are using linux based system try typing sudo npm i -g webpack-cli

Answer 5

I had a similar error. For me the answer was to ensure that the whole path to my project is free of spaces, ampersands(&) or any other weird characters.

Answer 6

If you are using Yarn instead NPM to run Webpack globally, you can install webpack using the following commands:
yarn global add webpack
and or
yarn global add webpack-cli