Laravel 5.4 ‘cross-env’ Is Not Recognized as an Internal or External Command

Question

I\'m trying to run npm run dev for Laravel Mix and I get this error:

> @ dev D:\\projects\\ptcs
> cross-env NODE_ENV=development webpack -         


        

Answer 1

First run:

rm -rf node_modules
rm package-lock.json yarn.lock
npm cache clear --force

Then run the command

npm install cross-env

npm install 

and then you can also run

npm run dev

Answer 2

For me simply run:

npm install cross-env

was enough

Answer 3

Try to run npm run dev in powershell. This worked for me.

Answer 4

There is the same problem in Linux OS. The issue is related on Windows OS, but Homestead is a Ubuntu VM, and the solution posted works strongly good in others SO. I applied the commands sugested by flik, and the problems was solved. I only used the following commands

I only used the following commands

rm -rf node_modules
npm cache clear --force

After

npm install cross-env
npm install 
npm run watch

It's working fine on linux Fedora 25.

Answer 5

This worked for me (on Windows 10):

1. Add the following lines into your scripts in the package.json file:

   "dev": "npm run development",
   "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
   "watch": "npm run development -- --watch",
   "watch-poll": "npm run watch -- --watch-poll",
   "hot": "cross-env NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
   "prod": "npm run production",
   "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
   

2. Make your devDependencies looks something like this:

   "devDependencies": {
       "axios": "^0.18",
       "bootstrap": "^4.0.0",
       "popper.js": "^1.12",
       "cross-env": "^5.1",
       "jquery": "^3.2",
       "laravel-mix": "^2.0",
       "lodash": "^4.17.4",
       "vue": "^2.5.7"
   }
   

3. Remove node_modules folder

4. Run npm install
5. Run npm run dev

Answer 6

Following these steps solved my problem.

1. Delete node_modules directory
2. Delete package-lock.json file
3. Start command prompt as Administrator <- important
4. Run npm install
5. Run npm run dev