npm-install

TLDR

Install all dependencies

$ npm install

Install specific package

$ npm install [package]

Install as dev dependency

$ npm install -D [package]

Install specific version

$ npm install [package]@[version]

Install globally

$ npm install -g [package]

Install from git

$ npm install [git+https://github.com/user/repo.git]

Clean install (CI)

$ npm ci

SYNOPSIS

npm install [options] [packages...]

npm install (or npm i) installs packages and their dependencies. Without arguments, it installs everything in package.json. With package names, it adds them to the project.
The package-lock.json ensures reproducible installs.

PARAMETERS

-D, --save-dev

Save as devDependency.

-g, --global

Install globally.

-E, --save-exact

Save exact version.

--no-save

Don't update package.json.

--legacy-peer-deps

Ignore peer dep conflicts.

--force

Force fetch packages.

VERSION RANGES

$ npm install lodash         # Latest
npm install lodash@4.17.0  # Exact
npm install lodash@^4.0.0  # Compatible
npm install lodash@~4.17.0 # Patch updates

CAVEATS

npm ci is faster for CI/CD. Peer deps may cause issues in npm 7+. Lock file should be committed.

HISTORY

npm install has been the core command of npm since Isaac Schlueter created npm in 2010 for Node.js package management.