Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up for free
Hijrah ke TypeScript
Ariya Hidayat
December 11, 2019
Programming
0
210
Hijrah ke TypeScript
Ariya Hidayat
December 11, 2019
Tweet
Share
More Decks by Ariya Hidayat
See All by Ariya Hidayat
Making a Bigger Impact with Open Source
ariya
0
37
Practical Testing of Firebase Projects
ariya
0
31
Practical CI/CD for React Native
ariya
0
49
Unggul dan Berdikari dengan Open-source
ariya
0
160
Practical CI/CD for React Native
ariya
1
310
Integrasi Berkesinambungan untuk React Native
ariya
1
280
Fungsional dengan JavaScript
ariya
0
200
Serverless Architecture
ariya
0
280
Squeezing Images
ariya
2
340
Other Decks in Programming
See All in Programming
Efficient UI testing in Android
alexzhukovich
2
130
サーバーレスパターンから学ぶデータ分析基盤構築 / devio2022
kasacchiful
0
510
僕が便利だと感じる Snow Monkey の特徴/20220723_Gifu_WordPress_Meetup
oleindesign
0
110
Rに管理されてみる
kazutan
0
260
ESM移行は無理だけどおれもSindreのライブラリが使いたい!
sosukesuzuki
2
560
レビュー駆動学習のススメ_StaPy#83
soogie
0
320
Scaling Productivity- How we have improved our dev experience
sockeqwe
1
120
Rust on Lambda 大きめCSV生成
atsuyokota
1
400
OSS貢献を気軽にしたい Let's Go Talk #1
yuyaabo
2
240
Google IO 2022 社内LT会 / What's new in Android development tools
shingo_kobayashi
1
420
20220706_Google Apps Scriptを実演で学ぶ~ GAS × Slack ~
apachan
2
630
SRE NEXT 2022に学ぶこれからのSREキャリア
fukubaka0825
2
400
Featured
See All Featured
Optimizing for Happiness
mojombo
364
64k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
316
19k
Atom: Resistance is Futile
akmur
255
20k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
212
20k
Product Roadmaps are Hard
iamctodd
35
6.9k
BBQ
matthewcrist
74
7.9k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
6
580
The Straight Up "How To Draw Better" Workshop
denniskardys
225
130k
Testing 201, or: Great Expectations
jmmastey
21
5.5k
Bootstrapping a Software Product
garrettdimon
296
110k
Happy Clients
brianwarren
89
5.6k
Gamification - CAS2011
davidbonilla
75
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