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
420
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
130
Vector Search and LLM
ariya
0
130
Making a Bigger Impact with Open Source
ariya
0
78
Practical Testing of Firebase Projects
ariya
0
96
Practical CI/CD for React Native
ariya
0
110
Unggul dan Berdikari dengan Open-source
ariya
0
270
Practical CI/CD for React Native
ariya
1
440
Integrasi Berkesinambungan untuk React Native
ariya
1
380
Fungsional dengan JavaScript
ariya
0
280
Other Decks in Programming
See All in Programming
WebDriver BiDiとは何なのか
yotahada3
1
150
Ruby on cygwin 2025-02
fd0
0
150
負債になりにくいCSSをデザイナとつくるには?
fsubal
10
2.5k
dbt Pythonモデルで実現するSnowflake活用術
trsnium
0
210
SpringBoot3.4の構造化ログ #kanjava
irof
3
1k
なぜイベント駆動が必要なのか - CQRS/ESで解く複雑系システムの課題 -
j5ik2o
12
4.4k
Rubyで始める関数型ドメインモデリング
shogo_tksk
0
130
pylint custom ruleで始めるレビュー自動化
shogoujiie
0
130
コミュニティ駆動 AWS CDK ライブラリ「Open Constructs Library」 / community-cdk-library
gotok365
2
180
Pythonでもちょっとリッチな見た目のアプリを設計してみる
ueponx
1
600
color-scheme: light dark; を完全に理解する
uhyo
6
460
Django NinjaによるAPI開発の効率化とリプレースの実践
kashewnuts
1
150
Featured
See All Featured
The MySQL Ecosystem @ GitHub 2015
samlambert
250
12k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
100
18k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
30
2.2k
RailsConf 2023
tenderlove
29
1k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.6k
The Pragmatic Product Professional
lauravandoore
32
6.4k
Bash Introduction
62gerente
611
210k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
175
52k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
21
2.5k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
Done Done
chrislema
182
16k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
280
13k
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