Error: Cannot find module 'webpack-cli/bin/config-yargs'

'Github' asked me to update 'webpack-dev-server' to version 3.1.11 or higher for security reasons.

However, 'npm run dev' will not run after the update.

I don't solve this problem

Error: Cannot find module 'webpack-cli/bin/config-yargs'

The code for 'package.json' is as follows.

  "dependencies": {
    "@vue/cli-plugin-babel": "^3.5.1",
    "config": "^3.0.1",
    "vue": "^2.5.2",
    "vue-router": "^3.0.1"
  },
  "devDependencies": {
    "vue-jest": "^1.0.2",
    "vue-loader": "^13.3.0",
    "vue-style-loader": "^3.0.1",
    "vue-template-compiler": "^2.5.2",
    "webpack": "^3.12.0",
    "webpack-bundle-analyzer": "^3.3.2",
    "webpack-cli": "^3.3.10",
    "webpack-dev-server": "^3.1.14",
    "webpack-merge": "^4.1.0"
  },
  "engines": {
    "node": ">= 6.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]

You could try changing webpack-dev-server to webpack serve in your npm run script inside package.json

For some reason the webpack team changed the command to webpack serve Change your package.json:

"start": "webpack serve"

Ref: https://github.com/webpack/webpack-dev-server/issues/2759

The version I am using:

"webpack": "^5.10.0",
"webpack-cli": "^4.2.0",
"webpack-dev-server": "^3.11.0"

To fix it just do 2 things.

1. Install npm i webpack-cli @webpack-cli/init
2. Add this to your package.json:

   "scripts": {
     "start": "webpack-cli serve --mode development"
   },
   

Done!

I agree that you have to upgrade from webpack 3 to 4, but specifically these are the steps I had to do, first, because webpack-cli has been split out into a separate package:

$ npm install webpack webpack-cli --save-dev

As explained here: https://webpack.js.org/guides/getting-started/#basic-setup

Delete package-lock.json file. Change following in package.json.

"webpack": "^4.32.2",
"webpack-cli": "^3.3.0",
"webpack-dev-server": "^3.11.0"

Run npm install

Change webpack-dev-server to webpack serve in package.json file.

e.g.: > "scripts": { "start": "webpack serve --mode development --open" },

It worked for me! ;-)

"scripts": {
    "start": "webpack serve --mode development",
    "build": "webpack --mode production"
  },

Run: npm run start or npm start now

It is because of version of webpack-cli. In some versions, there is no config-yargs.js file. So ^3.3.11 version of webpack-cli worked for me. Try it:

npm i webpack-cli@^3.3.11

in your script inside package.json use webpack serve instead of webpack-devserver

webpack core team says that form version 3+ the compatibility will foucs on webpack 4

so I think you need also to update webpack 3 to webpack 4

this doc may help you to achieve that https://webpack.js.org/migrate/4

You have to check to find out the latest versions of webpack, webpack-cli and webpack-dev-server and when you have that information edit package.json to reflect those versions and run yarn install --check-files Then you'll have to start the webpack-dev-server with the command "npx webpack serve"