How to choose the best npm module for your team?

Transcript

1. 1.

   How to choose the best npm module for your team?

   @sota1235
2. 2.

   Title @sota1235 Sota Sugiura Backend Engineer@Mercari, Inc. “My dream is

   to be JavaScript”
3. 3.

   Title @sota1235 Sota Sugiura Backend Engineer@Mercari, Inc. “My dream is

   to be JavaScript”
4. 4.

   Q. How many npm module are you using?

5. 5.

   None
6. 6.

   197

7. 7.

   197 ＝ 197 decisions

8. 8.

   Q. Can you explain a reason behind every npm module

   you chose?
9. 9.

   Let’s think! https://jp.freeimages.com/photo/thinking-1387695

10. 10.

    http://www.modulecounts.com/

11. 11.

    It’s like a jewelry box! Let’s choose!

12. 12.

    Wait!! Can you explain the Goal you set?

13. 13.

    Using a npm module is not Goal Goal is to

    solve the problem
14. 14.

    Define the Goal Think about the candidates Decide what to

    use Solve the problem
15. 15.

    Define the Goal Think about the candidates Decide what to

    use Solve the problem
16. 16.

    Define the Goal • There are still many problems to

    solve • We always use some tool to solve that problem
17. 17.

    Define the Goal Think about the candidates Decide what to

    use Solve the problem
18. 18.

    Search a npm module • www.npmjs.com • awesome-* pages •

    Recommendation from other engineers • Googling
19. 19.

    Define the Goal Think about the candidates Decide what to

    use Solve the problem
20. 20.

    Select from candidates • When you have multiple choices, you

    need to compare them • There are a lot of points to do that
21. 21.

    • Star count • API design • Size of community

    • Performance • Documentation • Test coverage • Quality of code • and so on...
22. 22.

    https://jp.freeimages.com/photo/cat-1537181

23. 23.

    Again, the Goal is... • Let’s decide the priority by

    thinking about the Goal • If you will use it for prototyping, not necessary to mind test coverage • If you will use it for only development environment, file size won’t be a problem
24. 24.

    OK, let’s use that!

25. 25.

    Wait!! Did you think about the cost to maintain that?

26. 26.

    Using a npm module is not free :( • It

    takes time to maintain • Managing vulnerability/version • If maintenance stops, you will need to fork it
27. 27.

    Think about Pros/Cons everytime • We SHOULD think about Pros/Cons

    everytime • What is the benefit to use that? • What is the problem to use that? • If Pros won, let’s use that!
28. 28.

    Define the Goal Think about the candidates Decide what to

    use Solve the problem
29. 29.

    None
30. 30.

    Q. Can you explain a reason behind every npm module

    you chose?
31. 31.

    Conclusion

32. 32.

    Make it better! • You should be able to explain

    the reason • It’ll be a good experience even if you made a wrong decision
33. 33.

    Thank you @sota1235 JavaScript lover