Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

TypeScript tips that could save your life

Sponsored · SiteGround - Reliable hosting with speed, security, and support you can count on. →
Avatar for Lucas Santos Lucas Santos
May 11, 2023
Technology
260
0

TypeScript tips that could save your life

Avatar for Lucas Santos

Lucas Santos

May 11, 2023

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
130
Escalando globalmente com TypeScript e JavaScript na Klarna
Avatar for Lucas Santos khaosdoctor
0
220
The future of JavaScript
Avatar for Lucas Santos khaosdoctor
0
96
É hora de falar sobre Deno
Avatar for Lucas Santos khaosdoctor
0
96
JS Software testing for beginners
Avatar for Lucas Santos khaosdoctor
0
110
Ambientes dinâmicos com GitHub Actions
Avatar for Lucas Santos khaosdoctor
0
71
The Dark Side of JavaScript
Avatar for Lucas Santos khaosdoctor
0
99
Integrating Containers Into JavaScript
Avatar for Lucas Santos khaosdoctor
0
89
Entendendo o ecossistema de containers
Avatar for Lucas Santos khaosdoctor
1
1.5k

Other Decks in Technology

See All in Technology
2026-09-04 SRE Tech Talk #15 怠惰なTerraform / Lazy Terraform
Avatar for SUZUKI Masashi masasuzu
0
230
Microsoft 365 Copilot chat -tekoälypalvelun tietosuojaongelmat
Avatar for Harto Pönkä hponka
0
620
WAF 運用改善の承認サイクル/SRE_BizReach_MIXI_1
Avatar for Visional Engineering ＆ Design visional_engineering_and_design
2
420
Omarchy Quattro の日本語設定周り
Avatar for Akira Shimosako simosako
2
140
幾何アルゴリズムで なめらかなピン操作を / iOSDC Japan 2026 / smoothpin
Avatar for nade kazumanagano
0
250
Deploying a Full-Stack Bun-Native Framework on Cloudflare Workers
Avatar for daiki7nohe 7nohe
0
130
日経電子版を支えていく Kasane Design System/fec_fukuoka
Avatar for 日本経済新聞社 エンジニア採用事務局 nikkei_engineer_recruiting
0
610
株式会社シーエーシー　エンジニア向け会社紹介資料
Avatar for 株式会社シーエーシー cac
0
57k
Podは生きているのにGoだけが落ちる：GOGCとGOMEMLIMITで追うInvisible OOM Killの謎
Avatar for Watanabe Takeshi(Buzz) tkc66buzz
1
500
【視聴者参加型！】AWSセキュリティアンチパターンクイズ
Avatar for Shun Yoshie syoshie
1
490
2026-09-11 【Snowflake World Tour Tokyo 2026】Snowflakeを起点に、AI Agentが自律稼働し続ける未来へ / Driving AI Agents with Snowflake
Avatar for civitaspo civitaspo
0
290
Multica × 長期記憶：40個のミニプロジェクト管理
Avatar for eiei114 eiei114
1
230

Featured

See All Featured
Performance Is Good for Brains [We Love Speed 2024]
Avatar for Tammy Everts tammyeverts
12
1.8k
Accessibility Awareness
Avatar for Sarah Abderemane sabderemane
1
210
Skip the Path - Find Your Career Trail
Avatar for Mark Kilby mkilby
1
220
How to build a perfect <img>
Avatar for Jono Alderson jonoalderson
1
6k
What the history of the web can teach us about the future of AI
Avatar for Ines Montani inesmontani
PRO
1
680
GraphQLの誤解/rethinking-graphql
Avatar for sonatard sonatard
75
12k
Reflections from 52 weeks, 52 projects
Avatar for Jefferson Lam jeffersonlam
356
21k
Bridging the Design Gap: How Collaborative Modelling removes blockers to flow between stakeholders and teams @FastFlow conf
Avatar for Kenny Baas-Schwegler baasie
0
690
Jess Joyce - The Pitfalls of Following Frameworks
Avatar for Tech SEO Connect techseoconnect
PRO
1
410
Joys of Absence: A Defence of Solitary Play
Avatar for Sebastian Deterding codingconduct
1
500
A Modern Web Designer's Workflow
Avatar for Chris Coyier chriscoyier
699
190k
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
31
6.2k

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