Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Sign up for free
Menu
Search
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Features
All features
Private URLs
Password Protection
Custom URLS
Scheduled publishing
Remove Branding
Restrict embedding
Deck Collections
Notes
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Explore
Featured decks
Featured speakers
Programming
Technology
Storyboards
Pricing
Search
Sign in
Sign up for free
The Dark Side of JavaScript
Search
Sponsored
·
Ship Features Fearlessly
Turn features on and off without deploys. Used by thousands of Ruby developers.
→
Lucas Santos
May 17, 2021
Technology
110
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
The Dark Side of JavaScript
Lucas Santos
May 17, 2021
More Decks by Lucas Santos
See All by Lucas Santos
The Hitchhiker's Guide for an Amazing API with TypeScript
khaosdoctor
0
140
Escalando globalmente com TypeScript e JavaScript na Klarna
khaosdoctor
0
230
The future of JavaScript
khaosdoctor
0
100
TypeScript tips that could save your life
khaosdoctor
0
270
É hora de falar sobre Deno
khaosdoctor
0
99
JS Software testing for beginners
khaosdoctor
0
110
Ambientes dinâmicos com GitHub Actions
khaosdoctor
0
77
Integrating Containers Into JavaScript
khaosdoctor
0
97
Entendendo o ecossistema de containers
khaosdoctor
1
1.5k
Other Decks in Technology
See All in Technology
夫婦で子育てするための育児標準化
codmoninc
PRO
0
130
自主式軟體工廠
philipz
0
250
Datadog の学び方 - あるいは、オブザーバビリティを学ぶとは何か
mananyuki
1
540
ファミコンでPHPを動かす / PHP on the Famicom side b
tomzoh
0
140
自作バイナリを動かす「入口」8選
puhitaku
2
1.3k
OpenSharing について熱く語る〜AI アセットの共有について〜
kameitomohiro
0
250
LLM機能を自作して分かるSnowflake Cortex AIの強み
nayuts
0
350
Execution in the Kingdom of Agents: Reflections on Abstraction and Complexity
bcantrill
0
900
脆弱性診断って、何をしているの? 〜弱点を見つけて、会社の改善につなげるまで〜
keeg
0
830
TinyGoでオブザーバビリティ?OpenTelemetryはTinyGoで使えるのか / Is OpenTelemetry available in TinyGo environment?
ymotongpoo
2
130
FactoryBotアンチパターン / factory_bot anti-patterns
toshimaru
0
150
今こそ知りたいAmplifyGen2
mkdev10
2
160
Featured
See All Featured
Crafting Experiences
bethany
1
380
Intergalactic Javascript Robots from Outer Space
tanoku
273
27k
How to Align SEO within the Product Triangle To Get Buy-In & Support - #RIMC
aleyda
2
1.8k
The Cost Of JavaScript in 2023
addyosmani
55
10k
Making the Leap to Tech Lead
cromwellryan
135
10k
Digital Projects Gone Horribly Wrong (And the UX Pros Who Still Save the Day) - Dean Schuster
uxyall
1
3.3k
jQuery: Nuts, Bolts and Bling
dougneiner
66
8.6k
Applied NLP in the Age of Generative AI
inesmontani
PRO
4
2.5k
Fireside Chat
paigeccino
43
4.1k
Redefining SEO in the New Era of Traffic Generation
szymonslowik
1
470
Design in an AI World
tapps
1
350
A designer walks into a library…
pauljervisheath
211
25k
Transcript
Javascript as you never saw before
cloud advocate_ who am I_
[email protected]
{twitter, facebook, linkedin…}.lsantos.dev
The magic JS
Removing Callbacks
The Dark Side of Javascript JS
Symbols
None
None
None
BUT BE AWARE_
Small usage example
Other usage example in Node.js source code bit.ly/nodejs-symbol Check it
out!
Async Iterators_
None
None
None
None
None
None
None
Promise.finally
None
Promise.allSettled
None
None
Ranges
None
None
None
Readonly properties_
Object.defineProperty
None
Object.defineProperties
‘age’ hasn’t been shown because it’s not enumerable
Private class fields_
None
None
Dynamic function creation_
None
None
in operator_
None
None
Dynamic instances by reflection_
None
None
None
Bitwise Operators_
AND
None
What!?
A B C D Result X 0 1 0 1
5 Y 0 0 0 1 1 Z 0 0 0 1 1
String as binary data
OR
None
A B C D Result X 0 1 0 1
5 Y 0 0 0 1 1 Z 0 1 0 1 5
XOR
None
A B C D Result X 0 1 0 1
5 Y 0 0 0 1 1 Z 0 1 0 0 4
Cryptography
None
NOT
None
A B C D Resultado X 0 1 0 1
5 Z 1 0 1 0 10
Existence condition
None
SHIFT
None
Multiply and divide
None
refs_ - imasters.com.br/desenvolvimento/o-lado-escuro-javascript - medium.com/trainingcenter/entendendo-promises-de-uma-vez-por-todas-3 2442ec725c2 - imasters.com.br/desenvolvimento/campos-publicos-e-privados-em-classes-j avascript-o-que-vem-por-ai-no-esnext -
imasters.com.br/javascript/futuro-das-promises-no-javascript - medium.com/trainingcenter/iterators-em-javascript-880adef14495 - medium.com/trainingcenter/reflection-em-javascript-73fc0e702e2 - developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objec ts/Reflect - slides.lsantos.dev/desmistificando-heranca-e-prototipos-no-javascript - dev.to/khaosdoctor/entendendo-async-iterators-1opo
thank you_ info.lsantos.dev