npm init (this will generate a package.json)
Install packages locally
1. see 'import express from 'express'; =>
npm install express
(node modules folder is created, regular dependence included in the project)
2.add dependency that is used throughout the development but not included in the production build =>
npm install babel-cli babel-preset-stage-0 babel-preset-es2015 --save-dev
install packages globally
install globally in C:\Program Files\nodejs\node_modules\npm?
install react globally => npm install -g react (sudo npm install react -g)
install the CLI tool to create application with react => sudo npm install create-react-app -g
update packages
sudo npm install [email protected] -g (install a package of a particular version)
npm outdated (check dependency only LOCALLY)
npm outdated -g (check dependency only GLOBALLY)
sudo npm install eslint -g
removing a package
npm uninstall babel-preset-es2015
npm instal babel-preset-env --save-dev
sematic versioning
1.4.2 means:
1 is major releases
4 is for minor releases
2 is for patch releases
^1.15.4 means:
caret for all minor and patches OK
~1.5.4 means:
tilde for all patches only
package.json
package.json is input and package-lock.json is output