Upgrade to Pro — share decks privately, control downloads, hide ads and more …

JS under the hood

Sponsored · Your Podcast. Everywhere. Effortlessly. Share. Educate. Inspire. Entertain. You do you. We'll handle the rest. →
Avatar for dimko1 dimko1
August 29, 2015
Technology
0
190

JS under the hood

Just a description of how JS works

Avatar for dimko1

dimko1

August 29, 2015
Tweet

More Decks by dimko1

See All by dimko1
Anti-patterns
Avatar for dimko1 dimko1
0
56
V8
Avatar for dimko1 dimko1
0
270

Other Decks in Technology

See All in Technology
Bedrock PolicyでAmazon Bedrock Guardrails利用を強制してみた
Avatar for Yudai Jinno yuu551
0
220
OpenShiftでllm-dを動かそう！
Avatar for jpishikawa jpishikawa
0
100
制約が導く迷わない設計 〜 信頼性と運用性を両立するマイナンバー管理システムの実践 〜
Avatar for ないとー bwkw
3
920
マーケットプレイス版Oracle WebCenter Content For OCI
Avatar for oracle4engineer oracle4engineer
PRO
5
1.6k
10Xにおける品質保証活動の全体像と改善 #no_more_wait_for_test
Avatar for nihonbuson nihonbuson
PRO
2
240
顧客の言葉を、そのまま信じない勇気
Avatar for yamatai12 yamatai1212
1
350
M&A 後の統合をどう進めるか ─ ナレッジワーク × Poetics が実践した組織とシステムの融合
Avatar for KNOWLEDGE WORK / 株式会社ナレッジワーク kworkdev
PRO
1
430
20260208_第66回 コンピュータビジョン勉強会
Avatar for KeiichiIto1978 keiichiito1978
0
130
コスト削減から「セキュリティと利便性」を担うプラットフォームへ
Avatar for SansanTech sansantech
PRO
3
1.5k
Bill One急成長の舞台裏 開発組織が直面した失敗と教訓
Avatar for SansanTech sansantech
PRO
2
370
Greatest Disaster Hits in Web Performance
Avatar for Estela Franco guaca
0
230
[CV勉強会@関東 World Model 読み会] Orbis: Overcoming Challenges of Long-Horizon Prediction in Driving World Models (Mousakhan+, NeurIPS 2025)
Avatar for abemii_ abemii
0
130

Featured

See All Featured
Believing is Seeing
Avatar for Spiro Bolos oripsolob
1
54
No one is an island. Learnings from fostering a developers community.
Avatar for Antonio thoeni
21
3.6k
Exploring the relationship between traditional SERPs and Gen AI search
Avatar for Ray Grieselhuber raygrieselhuber
PRO
2
3.6k
Optimizing for Happiness
Avatar for Tom Preston-Werner mojombo
379
71k
Highjacked: Video Game Concept Design
Avatar for Ryan Kendrick rkendrick25
PRO
1
290
Technical Leadership for Architectural Decision Making
Avatar for Kenny Baas-Schwegler baasie
1
240
Money Talks: Using Revenue to Get Sh*t Done
Avatar for Nikki Halliwell nikkihalliwell
0
150
Sam Torres - BigQuery for SEOs
Avatar for Tech SEO Connect techseoconnect
PRO
0
180
コードの90%をAIが書く世界で何が待っているのか / What awaits us in a world where 90% of the code is written by AI
Avatar for r-kagaya rkaga
60
42k
Building Flexible Design Systems
Avatar for Yesenia Perez-Cruz yeseniaperezcruz
330
40k
Groundhog Day: Seeking Process in Gaming for Health
Avatar for Sebastian Deterding codingconduct
0
92
Crafting Experiences
Avatar for Bethany Jepchumba bethany
1
48

Transcript

  1. JS under the hood

  2. Why? There is two types of developers who have no

    clue how their tools works: iOS devs and JS devs
  3. None
  4. None

  5. Object

  6. WTF IS OBJECT? An Object is a collection of properties.

    Each property is either a named data property, a named accessor property, or an internal property

  7. [[Prototype]]

  8. None

  9. Prototype Chain

  10. None

  11. this

  12. constructor

  13. None

  14. execution context

  15. Compiler Theory

  16. Steps • Tokenizing / Lexing • Parsing • Code-Generation

  17. Cast • Engine • Compiler • Scope

  18. LHS&RHS

  19. Scopes • Block Scope • Lexical Scope • Dynamic Scope(Runtime

    scope augmentation)

  20. rebinding /mutation

  21. None

  22. environment

  23. activation record model

  24. None
  25. None

  26. first-class functions

  27. free variable

  28. closure

  29. funArg problem upward/downward

  30. type casting

  31. coersion

  32. None
  33. None

  34. ?