#Laravel学习笔记# Laravel Mix的又一个坑

新安装的Laravel，按照官方教程试图安装Mix，使用默认的package.json在项目根目录运行以下命令（package.json是node的依赖文件，就像composer.json是composer的依赖文件是一个道理。

npm install

按照成功，然后运行

// Run all Mix tasks...
npm run dev

// Run all Mix tasks and minify output...
npm run production

报错
> node node_modules/cross-env/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

  module.js:442
  throw err;
  ^

  Error: Cannot find module '/Applications/XAMPP/xamppfiles/htdocs/visitor_backend/node_modules/cross-env/bin/cross-env.js'
  at Function.Module._resolveFilename (module.js:440:15)
  at Function.Module._load (module.js:388:25)
  at Module.runMain (module.js:575:10)
  at run (bootstrap_node.js:352:7)
  at startup (bootstrap_node.js:144:9)
  at bootstrap_node.js:467:3

  npm ERR! Darwin 16.0.0
  npm ERR! argv "/usr/local/Cellar/node/6.3.1/bin/node" "/usr/local/bin/npm" "run" "dev"
  npm ERR! node v6.3.1
  npm ERR! npm  v3.10.3
  npm ERR! code ELIFECYCLE
  npm ERR! @ dev: `node node_modules/cross-env/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`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the @ dev script 'node node_modules/cross-env/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'.
  npm ERR! Make sure you have the latest version of node.js and npm installed.
  npm ERR! If you do, this is most likely a problem with the  package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     node node_modules/cross-env/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
  npm ERR! You can get information on how to open an issue for this project with:
  npm ERR!     npm bugs
  npm ERR! Or if that isn't available, you can get their info via:
  npm ERR!     npm owner ls
  npm ERR! There is likely additional logging output above.

  npm ERR! Please include the following file with any support request:
  npm ERR!     /Applications/XAMPP/xamppfiles/htdocs/visitor_backend/npm-debug.log

细看发现是cross-env.js文件找不到了，再看package.json里发现启动参数里写的文件路径和node_modules里面的路径不一样，少了个\dist\文件夹路径，加上后可跑。