$30 off During Our Annual Pro Sale. View Details »

TypeScript tips that could save your life

Avatar for Lucas Santos Lucas Santos
May 11, 2023
Technology
0
210

TypeScript tips that could save your life

Avatar for Lucas Santos

Lucas Santos

May 11, 2023
Tweet

More Decks by Lucas Santos

See All by Lucas Santos
The Hitchhiker's Guide for an Amazing API with TypeScript
Avatar for Lucas Santos khaosdoctor
0
97
Escalando globalmente com TypeScript e JavaScript na Klarna
Avatar for Lucas Santos khaosdoctor
0
190
The future of JavaScript
Avatar for Lucas Santos khaosdoctor
0
60
É hora de falar sobre Deno
Avatar for Lucas Santos khaosdoctor
0
75
JS Software testing for beginners
Avatar for Lucas Santos khaosdoctor
0
81
Ambientes dinâmicos com GitHub Actions
Avatar for Lucas Santos khaosdoctor
0
42
The Dark Side of JavaScript
Avatar for Lucas Santos khaosdoctor
0
78
Integrating Containers Into JavaScript
Avatar for Lucas Santos khaosdoctor
0
70
Entendendo o ecossistema de containers
Avatar for Lucas Santos khaosdoctor
1
980

Other Decks in Technology

See All in Technology
品質のための共通認識
Avatar for KAKEHASHI kakehashi
PRO
3
240
生成AIでテスト設計はどこまでできる？ 「テスト粒度」を操るテーラリング術
Avatar for ks shota_kusaba
0
670
A Compass of Thought: Guiding the Future of Test Automation ( #jassttokai25 , #jassttokai )
Avatar for teyamagu teyamagu
PRO
1
250
Snowflakeでデータ基盤を もう一度作り直すなら / rebuilding-data-platform-with-snowflake
Avatar for pei0804 pei0804
4
1.3k
Haskell を武器にして挑む競技プログラミング ─ 操作的思考から意味モデル思考へ
Avatar for Naoya Ito naoya
6
1.4k
年間40件以上の登壇を続けて見えた「本当の発信力」/ 20251213 Masaki Okuda
Avatar for SHIFT EVOLVE shift_evolve
PRO
1
100
非CUDAの悲哀 〜Claude Code と挑んだ image to 3D “Hunyuan3D”を EVO-X2(Ryzen AI Max+395)で動作させるチャレンジ〜
Avatar for hawky the miscellaneous hawkymisc
1
170
EM歴1年10ヶ月のぼくがぶち当たった苦悩とこれからへ向けて
Avatar for maaaato maaaato
0
270
[デモです] NotebookLM で作ったスライドの例
Avatar for Takaaki Tanaka kongmingstrap
0
130
AWS Bedrock AgentCoreで作る 1on1支援AIエージェント 〜Memory × Evaluationsによる実践開発〜
Avatar for Yusuke Shimizu yusukeshimizu
6
380
AI時代の開発フローとともに気を付けたいこと
Avatar for KAMEGAWA Kazushi kkamegawa
0
2.9k
Gemini でコードレビュー知見を見える化
Avatar for ZOZO Developers zozotech
PRO
1
240

Featured

See All Featured
Faster Mobile Websites
Avatar for Dean Hume deanohume
310
31k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
Avatar for panda_program panda_program
122
21k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
Avatar for mongodb mongodb
48
9.8k
The Psychology of Web Performance [Beyond Tellerrand 2023]
Avatar for Tammy Everts tammyeverts
49
3.2k
Building a Modern Day 
E-commerce SEO Strategy
Avatar for Aleyda Solis aleyda
45
8.3k
CSS Pre-Processors: Stylus, Less & Sass
Avatar for Bermon Painter bermonpainter
359
30k
4 Signs Your Business is Dying
Avatar for Josh Pigford shpigford
186
22k
A Modern Web Designer's Workflow
Avatar for Chris Coyier chriscoyier
698
190k
How GitHub (no longer) Works
Avatar for Zach Holman holman
316
140k
Learning to Love Humans: Emotional Interface Design
Avatar for Aarron Walter aarron
274
41k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
Avatar for Dan Newman danielanewman
231
22k
A designer walks into a library…
Avatar for Paul Jervis Heath pauljervisheath
210
24k

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