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11. Package.json 5%

  • name

  • version - must be parseable by https://github.com/npm/node-semver

  • description - will be displayed in npm search

  • keywords - helps to find via npm search

  • homepage - project url

  • bugs - url string or

{
    "url" : "https://github.com/owner/project/issues","email" : "[email protected]"
}

If a url is provided, it will be used by the npm bugs command.

  • license

  • people fields: author, contributors - The “author” is one person. “contributors” is an array of people.

{
    "name" : "Barney Rubble", // is required
    "email" : "[email protected]",
    "url" : "http://barnyrubble.tumblr.com/"
}

  • files - files to be included when your package is installed as a dependency

  • main - file which is entrypoint to your program

  • browser - is a hint to javascript bundlers or component tools when packaging modules for client side use. See also https://github.com/defunctzombie/package-browser-field-spec .

  • bin - path to *.js for running in CLI

  • man - path to docs

  • directories

{
    "bin": "./bin", // use for adding all the files in an existing bin directory
    "doc": "./doc", // Put markdown files in here.
    "lib": "./lib", // where is most of files of your library, it’s useful meta info.
    "man": "./man", // A folder that is full of man pages.
    "example": "./example", // Put example scripts in here.
    "test": "./test" // Put your tests here
},

  • repository - Specify the place where your code lives. If the git repo is on GitHub, then the npm docs command will be able to find you.

  • scripts - for npm run [script_name]. See also https://docs.npmjs.com/misc/scripts

  • config - set configuration parameters used in package scripts that persist across upgrades https://docs.npmjs.com/files/package.json.html#config

  • dependencies - a simple object that maps a package name to a version range https://docs.npmjs.com/files/package.json.html#dependencies

  • devDependencies - the same but for development purpuses (will NOT be installed in npm install --production)

  • peerDependencies - list of dependencies that should be installed separately.

  • bundleddependencies - an array of package names that will be bundled when publishing the package.

  • optionaldependencies

  • engines - You can specify the version of node that your stuff works on:

{ "engines" : { "node" : ">=0.10.3 <0.12" } }

or npm:

{ "engines" : { "npm" : "~1.0.20" } }

  • engineStrict - This feature was removed in npm 3.0.0

  • os - specify which operating systems your module will run on:

"os" : [ "darwin", "linux" ]

with "!" you can exclude

"os" : [ "!win32" ]

  • cpu - the same as os but cpu)

  • preferGlobal - prefer --global installation

  • private - if true then npm will refuse to publish it.

  • publishConfig - config values that will be used at publish-time.

Default values

https://docs.npmjs.com/files/package.json.html#default-values

  • "scripts": { "start": "node server.js" }
  • "scripts": { "install": "node-gyp rebuild" }