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

Example 1: react-scripts is not recognized as an internal command windows

//If you transfered Your Project from another machime or from github then just 
//Install react-scripts again !! 

//UP vote if it helped you !

npm i -g react-scripts

Example 2: 'react-scripts' is not recognized as an internal or external command,

file not fond problem 
rm -rf node_modules && npm install

Example 3: 'react-scripts' n’est pas reconnu en tant que commande interne ou externe, un programme exécutable ou un fichier de commandes.

yarn upgrade
//or
npm update

Example 4: 'npm' is not recognized as an internal or external command, operable program or batch file.

path ->  C:\Program Files\nodejs\
To the end of your Path variable on the "User variable" section of the Environment Variables on the System Properties.

After that, reopen your command prompt and type
npm

Example 5: react-scripts not recognized

Be sure you have node_modules installed

Example 6: 'react-scripts' is not recognized as an internal or external command,

"scripts": {
  "build-css": "node-sass src/ -o src/",
  "build-js": "react-scripts build",
  "build": "npm run build-css && npm run build-js",
  "start-css": "npm run build-css && npm run build-css -- --watch --recursive",
  "start-js": "react-scripts start",
  "start": "npm-run-all -p start-css start-js",
  "test": "react-scripts test --env=jsdom",
  "eject": "react-scripts eject"
},