How to resolve npm run dev missing script issues?

Question

I am currently in the folder 'C:\Users\vignesh\Documents\Personal Projects\Full-Stack-Web-Developement' on gitbash

npm run dev

executing the above command on gitbash gives me the following error. I am assuming this is due to the NODE_PATH variables not being set properly. Please let me know if anyone has a solution to the below problem

npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"
npm ERR! node v4.4.6
npm ERR! npm  v2.15.5
npm ERR! missing script: dev

Solution 1

npm run <command>

will run bash script from package.json from 'scripts' value of '' attribute. For example:

package.json

{
   "name": "app",
   "version": "0.0.0",
   "license": "MIT",
   "scripts": {
      "server": "webpack-dashboard -- webpack-dev-server --inline --port 8080",
      "webdriver-update": "webdriver-manager update",
   },
  "dependencies": {
   "@angular/common": "~2.2.0",
   "@angular/core": "~2.2.0"
   },
  "devDependencies": {
   "@types/core-js": "^0.9.0"
   }
}

In this case you can run scripts:

npm run server
npm run webdriver-update

In your case you probably wont have dev script.

Remember that few scripts name are reserved (for example npm test will try to run, npm run pretest, npm run test, npm run posttest). More info on https://docs.npmjs.com/misc/scripts

Solution 2

Simply check the package.json file and see what the name of the key is for dev. In my case it was start instead of dev, so I ran npm run start and that did it.

Screenshot:

Solution 3

Adding

"scripts": {
   "dev": "nodemon server.js",

},

to your package.json resolves the problem.

Solution 4

After you install:

npm install --save-dev nodemon

Go in the package.json and add "dev": "nodemon ./bin/www"

Solution 5

Check the package.json file and see whether it is dev. I face the exact problem and in my case, it started. so I used the command npm run start and it worked.

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