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Working with npm packages

How to find npm package?
How to modify npm package?
How to create npm package?

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Working with npm packages

  1. 1. Working with npm packages Tomasz Bąk
  2. 2. https://www.npmjs.com
  3. 3. https://www.npmjs.com
  4. 4. Most popular languages used on GitHub by opened Pull Request in last 12 months https://octoverse.github.com/ 4395 PRs a day
  5. 5. Agenda ● How to find npm package? ● How to modify npm package? ● How to create npm package?
  6. 6. 41 stars 2,862 downloads in the last month last commit 1 year ago 26 stars 1,548 downloads in the last month last commit 1 month ago 1,752 stars 123,133 downloads in the last month
  7. 7. How to find npm package? ● Google, github.com, npmjs.com ○ always check github activity and code quality ○ Downloads (npmjs.com) > Github stars > search result position ● github activity ○ commits, issues, pull requests ● quality ○ documentation, demo page, code, tests
  8. 8. How to fix npm package? ● research ○ Github issues ○ source code ○ StackOverflow and other libs issues / source code ● fork, create branch and PR ● install modified package via npm
  9. 9. How modify npm package locally? ● fork and create branch ● use local package version ○ "dependencies": {"somelib": "file:../path/to/somelib"} ○ npm install
  10. 10. How to distribute modified package? ● npm install --save github-user/somelib#my-fix-branch ○ more at https://docs.npmjs.com/files/package.json#dependencies ○ will not work if dist/ code is .gitignored ● npm install --save github-user-somelib-my-fix ○ change “name” to github-user-somelib-my-fix ○ npm build ○ npm publish
  11. 11. How to create npm package? ● npm init ○ "name": "somelib" ○ "main": "index.js" ● add ○ README.md ○ "repository" : { "type" : "git", "url" : "https://github.com/me/somelib.git"} ○ "scripts" : { "test": ... } ○ more at https://docs.npmjs.com/files/package.json ● npm publish ○ bump "version": "0.0.2"!
  12. 12. Summary ● prefer npm package with ○ quality ○ Github activity ○ downloads ● when you need to make change ○ research it ○ modify package locally ○ make PR

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