#CheatSheet #NodeJS

NodeJS_CheatSheet.md

• Check nodejs version
  • Node -v
• Running npm behind corporate proxy
  • npm config set proxy http://10.41.161.24:3128
  • npm config set https-proxy http://10.41.161.24:3128
• Running js file from command prompt using node
  • Create a js file(test.js)
  • Add content: console.log('Hello')
  • Run from command prompt
    • Node test.js
  • Debugging
    • debugger
      • Add "debugger" keyword in code [ https://nodejs.org/dist/latest-v7.x/docs/api/debugger.html]
      • Command : node debug xxx.js
    • Node inspector
      • https://github.com/node-inspector/node-inspector
  • Npm commands
    • Npm start: runs the start script in package.json
    • Npm search [keyword] : search npm registry for package based on keyword
    • Npm ls : shows list of dependent packages (full list)
    • Npm ls --depth=0: shows list of dependent packages (only high level)
    • Npm ls -g --depth=0: show list of package including global ones
    • Npm docs [package]: display documentation for a particular package
    • Npm repo [package]: takes you to the repository of the package
    • Npm install [package] : install a package
    • Npm install [package] --save : install a package and save version in package.json
    • Npm install [package]@[version]: install specific version of a package
    • Npm install -g [package-name]: install package globally
    • Npm update: updates all packages
    • Npm update [package]: updates specific package
    • Npm init : create a package.json file
    • Npm help [command]: get help for a command
    • Npm uninstall [package]: to uninstall a package
    • Npm uninstall [package] --save: uninstall a package and change package.json
    • Npm outdated: show list of current, wanted and latest packages versions
    • Npm run [custom-script]: run a custom script mentioned in package.json
  • Useful packages
    • Morgan:
    • Nodemon: automatically starts node application if any file changes, useful during development.
  • Console in Chrome : f12