'react-scripts' is not recognized as an internal or external command

I've got a maven project, within which is JavaScript project cloned as a git sub-module. So the directory structure looks like mavenapp/src/main/javascript/[npm project files]

Inside my package.json, the test looks like this:

"test": "react-scripts test --env=jsdom",

but when I try to run npm test, it says

'react-scripts' is not recognized as an internal or external command,

Interestingly, when I clone the javascript project independently I don't get this error. I've tried re-running npm install.

NPM version: 5.5.1
Node.js version: 9.3.0

Solution 1:

It is an error about react-scripts file missing in your node_modules/ directory at the time of installation.

Check your react-script dependency is avaliable or not in package.json.

If not available then add it manually via:

npm install react-scripts --save

Solution 2:

If react-scripts is present in package.json, then just type this command

npm install

If react-scripts is not present in package.json, then you probably haven't installed it. To do that, run:

npm install react-scripts --save

Solution 3:

Try:

rm -rf node_modules && npm install

Wiping node_modules first, often tends to fix a lot of weird, package related issues like that in Node.

Solution 4:

Running these commands worked for me:

npm cache clean --force
npm rebuild
npm install