npm.md

How to upgrade npm

npm install npm -g -f

How to upgrade node

npm install node -g -f

How to list configurations

npm config list

How to show node_modules folder

# global
npm root -g

# local
npm root

How to list installed packages

# global
npm ls --depth 0 -g

# local
npm ls --depth 0

How to update installed packages

# global
npm update -g

# local
npm update

How to install a package locally and add it to devDependencies

npm install <package> --save-dev 

• devDependencies is for developers and not for users.
• Packages in devDependencies will not be installed when users do npm install <package>.
• You cannot install a package globally and add it to devDependencies

How to uninstall a global package

npm uninstall <package> -g

How to uninstall a local package and remove it from devDependencies

npm uninstall <package> --save-dev

How to install a scoped package

npm install @scope/project

• A package preceded by an @ symbol such as @username/package is a scoped package.
  • A scope lets you create a package with the same name as a package created by another user or organization, which is conventionally called "Org" in Node.js, without conflict.
  • https://docs.npmjs.com/about-scopes
  • https://docs.npmjs.com/misc/scope

How to create package.json

npm init -y

How to run an executable in a local package

npx <executable> # e.g. npx tsc foo.ts

Tip: If you are using npm 5.2 or higher, we recommend using npx to run packages globally. https://docs.npmjs.com/downloading-and-installing-packages-globally

How to work with ESLint in Visual Studio Code

1. npm init -y
2. npm install eslint eslint-config-google --save-dev
3. code .

How to work with Puppeteer in Visual Studio Code

1. npm init -y
2. npm install eslint eslint-config-google puppeteer --save-dev
3. code .

Note

• --save has been the default behavior since npm 5.
  • https://blog.npmjs.org/post/161081169345/v500