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为什么'npm run watch'在laravel中给出错误？

我正在关注本教程/。在本教程中，当在命令提示符下执行“ npm run watch”时，将在public / backend / js中创建一个app.js文件。但是当我执行“ npm run watch”时，没有创建这样的文件。执行'npm run watch'命令后，我在命令提示符下找到了这个]

> @ watch E:\Laravel\ecommerce-application
> npm run development -- --watch


> @ development E:\Laravel\ecommerce-application
> 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"

internal/modules/cjs/loader.js:960
  throw err;
  ^

Error: Cannot find module 'E:\Laravel\ecommerce-application\node_modules\cross-env\dist\bin\cross-env.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:957:15)
    at Function.Module._load (internal/modules/cjs/loader.js:840:27)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ 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"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ development script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\J.U.Jisan\AppData\Roaming\npm-cache\_logs\2020-05-09T18_22_08_016Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @ watch: `npm run development -- --watch`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ watch script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\J.U.Jisan\AppData\Roaming\npm-cache\_logs\2020-05-09T18_22_08_158Z-debug.log

我正在按照本教程。在本教程中，在命令提示符下执行“ npm run watch”时，app.js ...

回答如下：

请运行：npm install然后npm run watch

本文标签： 为什么39npm run watch39在laravel中给出错误

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