Local package.json exists, but node_modules missing

问题

I am trying to start a Redux application I just cloned from a GitHub repository.

I tried to run it with the following command

npm start

I am getting this error

> react-redux@1.0.0 start /home/workspace/assignment
> webpack-dev-server --config ./configs/webpack/webpack.config.development.js

sh: 1: webpack-dev-server: not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! react-redux@1.0.0 start: `webpack-dev-server --config ./configs/webpack/webpack.config.development.js`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the react-redux@1.0.0 start 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!     /home/.npm/_logs/2018-05-15T16_32_44_571Z-debug.log

Any help will be appreciated

回答1:

npm start runs a script that the app maker built for easy starting of the app npm install installs all the packages in package.json

run npm install first

then run npm start

回答2:

This issue can also raise when you change your system password but not the same updated on your .npmrc file that exist on path C:\Users\user_name, so update your password there too.

please check on it and run npm install first and then npm start.

回答3:

Just had the same error message, but when I was running a package.json with:

"scripts": {
    "build": "tsc -p ./src",
}

tsc is the command to run the TypeScript compiler.

I never had any issues with this project because I had TypeScript installed as a global module. As this project didn't include TypeScript as a dev dependency (and expected it to be installed as global), I had the error when testing in another machine (without TypeScript) and running npm install didn't fix the problem. So I had to include TypeScript as a dev dependency (npm install typescript --save-dev) to solve the problem.

来源：https://stackoverflow.com/questions/50355263/local-package-json-exists-but-node-modules-missing

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javascript

reactjs

npm

redux

react-redux