[javascript] How do you run a js file using npm scripts?

I can't get npm to work. My package.json file has

"scripts": { "build": "build.js" }

and I have a build.js file in the same folder that just console.logs.

When I run

npm run build

I get the error

The system cannot execute the specified program.

npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "build"
npm ERR! node v4.1.1
npm ERR! npm  v3.3.5
npm ERR! code ELIFECYCLE

and if I move the build.js file and change my package.json file to have a subfolder

"scripts": { "build": "build/build.js" }

then I get the error

'build' is not recognized as an internal or external command, operable program or batch file.

What's going wrong? I'm copying the example documentation.

This question is related to javascript node.js npm

The answer is


{ "scripts" :
  { "build": "node build.js"}
}

npm run build OR npm run-script build


{
  "name": "build",
  "version": "1.0.0",
  "scripts": {
    "start": "node build.js"
  }
}

npm start


NB: you were missing the { brackets } and the node command

folder structure is fine:

+ build
  - package.json
  - build.js

You should use npm run-script build or npm build <project_folder>. More info here: https://docs.npmjs.com/cli/build.


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