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TypeScript tips that could save your life

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Avatar for Lucas Santos Lucas Santos
May 11, 2023
Technology
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TypeScript tips that could save your life

Avatar for Lucas Santos

Lucas Santos

May 11, 2023
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Transcript

  1. TypeScript tips that could save your life

  2. who am I_ {twitter, youtube, linkedin…}.lsantos.dev software engineer_ [email protected]

  3. typescript can be tricky sometimes

  4. so let's cut to the chase_

  5. tsconfig extension_

  6. None
  7. None
  8. None
  9. None
  10. None

  11. It's not only for bases

  12. It's not only for bases

  13. type_ testing

  14. one native way: *.typetest.ts files

  15. one native way: *.typetest.ts files https://lsantos.dev/keychain-pull

  16. the (more) native way

  17. vitest

  18. tsd https://lsantos.dev/tsd-lib

  19. move errors to types

  20. instead of this

  21. do this

  22. branded types_

  23. UUIDs are the perfect example

  24. to brand a type

  25. to brand a type

  26. even better

  27. but well… Why isn't this working

  28. but well… Why isn't this working To be continued…

  29. but there's another example

  30. type guards_

  31. but well… Why isn't this working

  32. now we have something

  33. but this if…

  34. assertion functions

  35. assertion out of tests

  36. understand your enums_

  37. enums produce valid JavaScript

  38. enums produce valid JavaScript

  39. numeric enums

  40. string enums

  41. constant enums

  42. constant enums

  43. obrigado_ lsantos.dev