Node & NPM Cheat Sheet

Node.js CLI

Command	Description	Examples/Options
`node [file]`	Run a JavaScript file with Node.js.	`node index.js`
`node -v`	Check Node.js version.
`node -e "code"`	Execute JavaScript code directly from the CLI.	`node -e "console.log('Hello World!')"`
`node --inspect [file]`	Run Node.js in debugging mode.
`node --inspect-brk [file]`	Start Node.js with debugger and pause on the first line.
`node --eval "code"`	Evaluate a string as JavaScript code.
`node --trace-warnings`	Show full stack trace when warnings are thrown.
`node --help`	Get help information on Node.js CLI commands.

NPM Package Management

Command	Description	Examples/Options
`npm init`	Create a `package.json` file interactively.	`npm init -y` (skip prompts and create default)
`npm install [pkg]`	Install a package.	`npm install express`
`npm install [pkg] --save`	Install a package and save it as a dependency.
`npm install [pkg] --save-dev`	Install a package and save it as a development dependency.
`npm install`	Install all packages listed in `package.json`.
`npm uninstall [pkg]`	Uninstall a package.
`npm update [pkg]`	Update a package to the latest version.
`npm outdated`	Check for outdated packages.
`npm list`	List all installed packages.
`npm prune`	Remove extraneous packages not listed in `package.json`.

NPM Scripts

Command	Description	Examples/Options
`npm run [script]`	Run a script defined in `package.json`.	`npm run build`
`npm run [script] --silent`	Run a script with no output.
`npm test`	Run tests defined in `package.json` (`test` script).
`npm start`	Run the `start` script defined in `package.json`.
`npm stop`	Run the `stop` script defined in `package.json`.
`npm restart`	Run the `restart` script defined in `package.json`.
`npm run [script] -- --flag`	Pass additional flags to npm scripts.	`npm run build -- --prod`

Global vs Local Installation

Command	Description	Examples/Options
`npm install -g [pkg]`	Install a package globally (available system-wide).	`npm install -g nodemon`
`npm uninstall -g [pkg]`	Uninstall a globally installed package.
`npm install [pkg]`	Install a package locally (in the current project directory).	`npm install express`
`npm uninstall [pkg]`	Uninstall a locally installed package.
`npm ls -g --depth=0`	List globally installed packages without showing dependencies.

NPM Cache Management

Command	Description	Examples/Options
`npm cache clean --force`	Clean the NPM cache.
`npm cache verify`	Verify the contents of the cache and clean up unnecessary files.
`npm cache add [pkg]`	Add a package to the cache.
`npm cache ls`	List all cached packages.

NPM Versioning and Publishing

Command	Description	Examples/Options
`npm version [update_type]`	Update the version of your package (`patch`, `minor`, `major`).	`npm version patch`
`npm publish`	Publish your package to the NPM registry.
`npm unpublish [pkg]`	Unpublish a package (use caution, as it has limitations).
`npm deprecate [pkg]`	Deprecate a version of a package.

NPM Audit and Security

Command	Description	Examples/Options
`npm audit`	Perform a security audit of your dependencies.
`npm audit fix`	Automatically fix security vulnerabilities where possible.
`npm audit fix --force`	Apply potentially breaking changes to fix vulnerabilities.
`npm audit --json`	Output audit results in JSON format.

NPM Configuration

Command	Description	Examples/Options
`npm config list`	List NPM's current configuration settings.
`npm config set [key]=[value]`	Set a configuration value.	`npm config set registry https://registry.npmjs.org/`
`npm config delete [key]`	Delete a configuration value.
`npm config get [key]`	Get the value of a specific configuration.	`npm config get registry`
`npm set init.author.name`	Set default values for `package.json` fields.

Npx (NPM Package Runner)

Command	Description	Examples/Options
`npx [package]`	Run a package without installing it globally.	`npx create-react-app my-app`
`npx --no-install [package]`	Run a package without installing and skip package lookup.
`npx [package]@version`	Run a specific version of a package.	`npx create-react-app@4.0.3 my-app`
`npx -p [package] [command]`	Run a package and execute a command within it.	`npx -p @angular/cli ng new my-app`
`npx --ignore-existing`	Run a command ignoring globally installed versions.
`npx --help`	Get help about npx commands.