Laravel 5.4“ cross-env”不被认为是内部或外部命令

我尝试运行 npm run dev的 Laravel Mix，我得到了这个错误:

> @ dev D:\projects\ptcs
> cross-env NODE_ENV=development webpack --progress --hide-modules --
config=node_modules/laravel-mix/setup/webpack.config.js


'cross-env' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ dev: `cross-env NODE_ENV=development webpack --progress --hide-
modules --config=node_modules/laravel-mix/setup/webpack.config.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ dev script.

我把 node.js 更新到6.11.0，npm 更新到5.2.0，但是没有用，我在 Windows 7上运行 Homestead。

153975 次浏览
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Before try running npm run dev please run npm install --no-bin-links in the project directory, this will install all required packages. Also check this link for compiling instruction. https://laravel.com/docs/5.4/mix

Also double check in your conf file, wherever you find something like this

(something)/cross-env/bin/(something)

change it to

(something)/cross-env/dist/bin/(something)

If you are using homestead, in package.json paste this

{
"private": true,
"scripts": {
"dev": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch-poll": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --watch-poll --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"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",
"production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
},
"devDependencies": {
"axios": "^0.15.3",
"bootstrap-sass": "^3.3.7",
"cross-env": "^3.2.3",
"jquery": "^3.1.1",
"laravel-mix": "^0.8.1",
"lodash": "^4.17.4",
"vue": "^2.1.10"
}
}

Also check this link https://github.com/JeffreyWay/laravel-mix/issues/478

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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
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According to this issue comment, editing cross-env path will fix the problem. Change cross-env to node node_modules/cross-env/dist/bin/cross-env.js in package.json like this:

    "dev": "npm run development",
"development": "node node_modules/cross-env/dist/bin/cross-env.js NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch": "node node_modules/cross-env/dist/bin/cross-env.js NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch-poll": "npm run watch -- --watch-poll",
"hot": "node node_modules/cross-env/dist/bin/cross-env.js 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": "node node_modules/cross-env/dist/bin/cross-env.js NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
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最佳答案

You need to make cross-env working globally instead of having it in the project.

1) remove node_modules folder

2) run

npm install --global cross-env

3) remove "cross-env": "^5.0.1", from package.json file devDependencies section. Actually, you can skip this step and keep package.json intact. If you prefer.

4) run

npm install --no-bin-links

5) run

npm run dev

and see it working

P.S Tested on Windows 10 with Laravel-5.4

P.P.S Windows 10 with Laravel-5.6 does not have this problem, thus updating is an alternative solution.

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I think this log entry Local package.json exists, but node_modules missing, did you mean to install? has gave me the solution. 

npm install && npm run dev
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Simply try running npm install / yarn etc first before running npm start / yarn start as @only4 mentioned, if you see this problem, as it means your .env is not in sync with your package.json, i.e. you installed a package but not quite configured it or other way around

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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
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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.

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Delete the node_modules folder

Then you should run the commands:

npm install --no-bin-links


npm run dev

It's worked on my Laravel 5.5 and Windows.

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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
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You are getting the error because you might not have run the command npm install first.

i.e. First, run npm install and then npm run dev

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Your error states that cross-env is not installed. 

'cross-env' is not recognized as an internal or external command, operable program or batch file.

You just need to run

npm install cross-env
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Try to run npm run dev in powershell. This worked for me.

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For me simply run:

npm install cross-env

was enough

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The following worked for Laravel 7.x (and should probably work for any other version as well given the nature of the issue).

npm uninstall --save-dev cross-env
npm install -g cross-env

Just moving cross-env from being a local devDependency to a globally available package.

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I real all the solution but there is not a standard solution...

JUST REMOVE NODEJS AND INSTALL THE LATEST VERSION OF NODEJS

instead of many bad shortcut solutions.

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Just npm install --save-dev cross-env in the root directory of your project.

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I finally got it to work by following these steps:

  1. Remove the file package-lock.json
  2. Run the command: npm install --force
  3. Try again to execute npm start

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