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Awesome npm resources and tips

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Update to the latest npm version

$ npm install --global npm

Windows users, read more.

Command aliases

Shell aliases

Speed up your common npm tasks.

In your .zshrc/.bashrc:

alias ni='npm install'
alias nid='npm install --save-dev'
alias nig='npm install --global'
alias nt='npm test'
alias nit='npm install && npm test'
alias nk='npm link'
alias nr='npm run'
alias ns='npm start'
alias nf='npm cache clean && rm -rf node_modules && npm install'
alias nlg='npm list --global --depth=0'

Don't add to package.json when installing

By default npm adds packages you install to the dependencies field in package.json (since v5). You can prevent this by specifying the --no-save flag. You can add a package to devDependencies with --save-dev/-D:

$ npm install --save-dev ava

Run scripts

You can easily run scripts using npm by adding them to the "scripts" field in package.json and run them with npm run <script-name>. Run npm run to see available scripts. Binaries of locally install packages are made available in the PATH, so you can run them by name. npm run foo will also run prefoo and postfoo if defined.

{
	"name": "awesome-package",
	"scripts": {
		"cat": "cat-names"
	},
	"dependencies": {
		"cat-names": "^1.0.0"
	}
}
$ npm run cat
Max

All package.json properties are exposed as environment variables:

{
	"name": "awesome-package",
	"scripts": {
		"name": "echo $npm_package_name"
	}
}
$ npm run name
awesome-package

Run script with npx

npm comes bundled with npx (Since v5.2.0) — a tool to execute package binaries. Each command is executed either from the local node_modules/.bin directory, or from a central cache, installing any packages needed in order for <command> to run.

{
	"name": "awesome-package",
	"dependencies": {
		"cat-names": "^1.0.0"
	}
}

If the binary is already installed, it will be executed from node_modules/.bin.

$ npx cat-names
Max

But if the binary is missing, it will be installed first.

$ npx dog-names
npx: installed 46 in 3.136s
Bentley

Run commands with different Node.js versions

With npx (Comes bundled with npm v5.2.0 or newer) and the node-bin package, you can easily try out code in different Node.js versions without having to use a version manager like nvm, nave, or n.

$ npx [email protected] -- node --version
v6.11.0

Link local packages

Sometimes it can be useful to have a local version of a package as a dependency. You can use npm link to link one local package into another. Run npm link in the package you want to use. This creates a global reference. Then go into your original package and run npm link <package-name> to link in the other package.

$ cd rainbow
$ npm link
$ cd ../unicorn
$ npm link rainbow

You can now use rainbow as a dependency in the unicorn package.

Install a package from GitHub

npm supports using a shorthand for installing a package directly from a GitHub repo:

$ npm install sindresorhus/chalk

Let's target a specific commit as master is a moving target:

$ npm install 'sindresorhus/chalk#51b8f32'

Specify either a commit SHA, branch, tag, or nothing.

You can also install Git dependencies with semver: (Requires npm v5 or newer)

$ npm install 'sindresorhus/chalk#semver:^2.0.0'

Install a specific version of a package

$ npm install [email protected]

List top-level installed packages and their version

$ npm ls --depth=0

Command help

Get help docs for a command:

$ npm help <command>

Example:

$ npm help install

Standalone version of a package

Quickly get a standalone version of a package that is browserified and usable in the browser.

https://wzrd.in/standalone/<package-name>[@<version>]

Examples:

Great for prototyping, but download the file or use Browserify yourself for production.

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To the extent possible under law, Sindre Sorhus has waived all copyright and related or neighboring rights to this work.