NPM run dev 出现这样错误我的解决办法

错误提示：

npm ERR! Windows_NT 10.0.10240
npm ERR! argv "E:\\nodejs\\node.exe" "E:\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"
npm ERR! node v6.10.0
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! @ dev: `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`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the @ dev script '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'.
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/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
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.

把bootstrap.js里面的东西直接复制到app.js里面即可，至于为什么，敬请期待！

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