Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Hijrah ke TypeScript
Search
Ariya Hidayat
December 11, 2019
Programming
0
360
Hijrah ke TypeScript
Ariya Hidayat
December 11, 2019
Tweet
Share
More Decks by Ariya Hidayat
See All by Ariya Hidayat
RAG for Small LLM
ariya
0
62
Vector Search and LLM
ariya
0
94
Making a Bigger Impact with Open Source
ariya
0
71
Practical Testing of Firebase Projects
ariya
0
65
Practical CI/CD for React Native
ariya
0
89
Unggul dan Berdikari dengan Open-source
ariya
0
230
Practical CI/CD for React Native
ariya
1
400
Integrasi Berkesinambungan untuk React Native
ariya
1
340
Fungsional dengan JavaScript
ariya
0
250
Other Decks in Programming
See All in Programming
Going beyond Apache Parquet's default settings
xhochy
0
120
単体テストを書かない技術 #phpcon_odawara
o0h
PRO
27
8.5k
Build Apps for iOS, Android & Desktop in 100% Kotlin With Compose Multiplatform (mDevCamp 2024)
zsmb
0
420
Exploring the Implementation of “t.Run”, “t.Parallel”, and “t.Cleanup”
akarin
1
110
Ruby Pattern Matching
bkuhlmann
0
930
Snowflakeで眠ったデータを起こそう!
estie
0
140
AmperとFleetを使ったAndroidアプリ
yoppie
0
250
Code Reviews
bkuhlmann
4
900
dbtのドメイン分割による データ基盤の改善とDigdagとの連携
sakama
0
440
try! Swift Tokyo 2024 参加報告 / try! Swift Tokyo 2024 Report
hironytic
0
220
CREってこういうこと? 体験入社 - 提案資料 - / what-is-cre-trial-employment
shinden
1
500
障害対応を起点としたもっといい開発と運用のサイクル作りのためにできること / Hatena Enginner Seminar #29
polamjag
0
360
Featured
See All Featured
What the flash - Photography Introduction
edds
64
11k
Raft: Consensus for Rubyists
vanstee
133
6.3k
It's Worth the Effort
3n
180
27k
Stop Working from a Prison Cell
hatefulcrawdad
267
19k
VelocityConf: Rendering Performance Case Studies
addyosmani
321
23k
What's new in Ruby 2.0
geeforr
337
31k
Adopting Sorbet at Scale
ufuk
69
8.6k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
155
14k
Product Roadmaps are Hard
iamctodd
45
9.7k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
352
28k
A Modern Web Designer's Workflow
chriscoyier
689
190k
The Cost Of JavaScript in 2023
addyosmani
20
3.9k
Transcript
Hijrah ke TypeScript https://unsplash.com/photos/Fq--9iqymkI
With great power, comes great responsibility -- Gundala
Konon, di jaman purbakala…
None
> biodata = { nama: 'Budi', umur: 34 } {
nama: 'Budi', umur: 34 } > console.log(biodata.usia) undefined
> biodata = { nama: 'Budi', umur: 34 } {
nama: 'Budi', umur: 34 } > console.log(biodata.umur) 34
export class LoginForm extends Component { static propTypes = {
submitAction: PropTypes.func.require, } }
None
None
None
None
Jenazah engineer bikin rusuh karena dulu nggak pakai TypeScript
Transisi Gradual
{ "compilerOptions": { "target": "esnext", "module": "commonjs", "allowJs": true, "checkJs":
true, "noEmit": true, "skipLibCheck": true "noEmitOnError": true, "jsx": "react-native", "moduleResolution": "node", "esModuleInterop": true }, "include": ["**/*.js"], "exclude": ["thirdparty/**.js"] } tsconfig.json
> npm install –save typescript
import React, { Component } from 'react'; Could not find
a declaration file for module ‘react’
> npm install –save @types/react > npm install –save @types/react-native
Property 'require' does not exist on type 'Requireable<(...args: any[]) =>
any>’. ts(2339)
None
diff --git a/package.json b/package.json index c9a3d0c..c0dfca4 100644 --- a/package.json +++
b/package.json @@ -4,6 +4,7 @@ "description": "", "main": "src/index.js", "scripts": { + "typecheck": "tsc -p src" }, "author": ""
> npm run typecheck src/LoginForm.js:16:38 - error TS2339: Property 'require'
does not exist on type 'Requireable<(...args: any[]) => any>’. 16 submitAction: PropTypes.func.require, ~~~~~~~ CI/CD
None
function todayIsNotWeekend() { const day = moment().utcOffset(7).isoWeekday(); const SATURDAY =
6; const SUNDAY = 0; return (day !== SATURDAY) || (day !== SUNDAY); }
> npm run typecheck src/Order.js:7:35 - error TS2367: This condition
will always return 'true' since the types '6' and '0' have no overlap. 7 return (day !== SATURDAY) || (day !== SUNDAY); ~~~~~~~~~~~~~~
function todayIsNotWeekend() { const day = moment().utcOffset(7).isoWeekday(); const SATURDAY =
6; const SUNDAY = 0; return (day !== SATURDAY) && (day !== SUNDAY); }
function todayIsWeekend() { const day = moment().utcOffset(7).isoWeekday(); const SATURDAY =
6; const SUNDAY = 0; return (day === SATURDAY) || (day === SUNDAY); } export function todayIsNotWeekend() { return !todayIsWeekend(); }
render() { return ( (!unreadCount > 0) ? <ClearIcon/> :
<BellIcon/> ) }
> npm run typecheck src/Inbox.js:12:14 - error TS2365: Operator '>'
cannot be applied to types 'boolean' and 'number'. 12 (!unreadCount > 0) ? <BellIcon/> : <ClearIcon/> ~~~~~~~~~~~~~~~~
!unreadCount > 0 (!unreadCount) > 0 Boolean Number
render() { return ( (unreadCount == 0) ? <ClearIcon/> :
<BellIcon/> ) }
validate() { let {email} = this.state; if (isValidEmail(this.email)) { this.setState({message:
''}); } else { this.setState({message: INVALID_EMAIL}); } }
> npm run typecheck src/LoginForm.js:15:29 - error TS2339: Property 'email'
does not exist on type 'LoginForm'. 15 if (isValidEmail(this.email)) { ~~~~~
validate() { let {email} = this.state; if (isValidEmail(email)) { this.setState({message:
''}); } else { this.setState({message: INVALID_EMAIL}); } }
Musuhnya kebanyakan nih
> npm install –save tsc-silent
diff --git a/package.json b/package.json index be761d1..58a2aca 100644 --- a/package.json +++
b/package.json @@ -4,7 +4,7 @@ "description": "", "main": "src/index.js", "scripts": { - "typecheck": "tsc -p src" + "typecheck": "tsc-silent -p src/tsconfig.json --suppressConfig src/tsc-silent.config.js" }, "author": "", "license": "ISC",
module.exports = { suppress: [ { pathRegExp: '/.*.js$', codes: [
2339, 2367 ] } ] } tsc-silent.config.js
> npm run typecheck Visible errors: 0, suppressed errors: 2
None
None
Engineering Excellence
Rekayasa Paripurna
Some artworks are from http://openclipart.org. @ariya114