Introduction | The AssemblyScript Book
# Introduction AssemblyScript compiles a variant of TypeScript (opens new window) (a typed superset of JavaScript) to WebAssembly (opens new window) using Binaryen (opens new window), looking like: export function fib(n: i32): i32 { var a = 0, b = 1 if (n > 0) { while (--n) { let t = a + b a = b b = t } return b } return a } It is similiar to TypeScript but with WebAssembly types, has some constra
TypeScriptã®interfaces vs types
先日ãƒãƒ¼ãƒ メンãƒãƒ¼ã¨ã€ŒTypeScriptã®interfaceã¨typeã®ã©ã£ã¡ãŒå¥½ã¿ã€ã‚’話ã—ã¾ã—ãŸã€‚個人的ã«å®‰å…¨æ´¾ãªã®ã§ã€interfaceを多ã採用ã—ã¦ã„ã¾ã™ã€‚今日interfaceã¨typeを比較ã—ã¦ã¿ã‚ˆã†ã¨æ€ã„ã¾ã™ã€‚ declaration merge interfaceã§ã¯declaration mergeãŒã§ãã¾ã™ã€‚ interface Car { price: number; } interface Car { weight: number; } /** * interface will be merged: * * interface Car { * price: number; * weight: number; * } */ const car: Car = { price: 10000, weight: 1.5 };
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2021/11/10 TECH STAND #6 TypeScriptã«ã¦ç™ºè¡¨ã—ãŸè³‡æ–™ã§ã™ã€‚
Documentation - TypeScript 2.0
Null- and undefined-aware types TypeScript has two special types, Null and Undefined, that have the values null and undefined respectively. Previously it was not possible to explicitly name these types, but null and undefined may now be used as type names regardless of type checking mode. The type checker previously considered null and undefined assignable to anything. Effectively, null and undefi
GitHub - typescript-cheatsheets/react: Cheatsheets for experienced React developers getting started with TypeScript
Cheatsheet for using React with TypeScript. Web docs | Contribute! | Ask! 👋 This repo is maintained by @eps1lon and @filiptammergard. We're so happy you want to try out React with TypeScript! If you see anything wrong or missing, please file an issue! 👠| The Basic Cheatsheet is focused on helping React devs just start using TS in React apps Focus on opinionated best practices, copy+pastable exa
React/TypeScriptã«ãŠã‘ã‚‹JSX element has no corresponding closing tagã®è§£æ±ºæ³• - フãƒãƒ³ãƒˆã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®
.tsã§ã‚¸ã‚§ãƒãƒªã‚¯ã‚¹ã‚’使用ã—ã¦ï¼Œã‚¢ãƒãƒ¼é–¢æ•°ã®åž‹å®£è¨€ã‚’è¡Œã†æ–¹æ³• const hello = <T>(name: T) => { return name; } // hello<string>("igarashi"); ã“れをãã®ã¾ã¾jsxã«è¨˜è¿°ã™ã‚‹ã¨<T>ãŒã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆã¨ã—ã¦èªè˜ã•ã‚Œã¦ã—ã¾ã„， TS17008: JSX element 'T' has no corresponding closing tag. ã¨ã‚¢ãƒ©ãƒ¼ãƒˆãŒè¡¨ç¤ºã•ã‚Œã‚‹ï¼Ž tsxã§ã‚¸ã‚§ãƒãƒªã‚¯ã‚¹ã‚’使用ã—ã¦ï¼Œã‚¢ãƒãƒ¼é–¢æ•°ã®åž‹å®£è¨€ã‚’è¡Œã†æ–¹æ³• https://github.com/Microsoft/TypeScript/issues/15713 ã§è°è«–ã•ã‚Œã¦ã„るよã†ã«åž‹å®£è¨€ã§ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«è¨˜è¿°ã™ã‚‹ï¼Ž <P extends {}>or<P extends object> 上記ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã«åæ˜ ã™ã‚‹ã¨ let hello = <T ext
Reactã§TypeScriptã®åž‹å®šç¾©ã‚’æ‹¡å¼µã™ã‚‹ - hiro08gh
ã“ã‚“ã«ã¡ã¯ã‹ã¿ã‚€ã‚‰ã§ã™ã€‚最近ã¯ã€React + TypeScriptをよã書ã„ã¦ã„ã‚‹ã®ã§ã™ãŒã€ä¸‹è¨˜ã®ã‚ˆã†ãªã‚¨ãƒ©ãƒ¼ãŒç™ºç”Ÿã—ã¾ã—ãŸã€‚ ã“ã“ã§ã‚„ã‚ŠãŸã‹ã£ãŸã“ã¨ã¯ã€Chromeã§ã‚µãƒãƒ¼ãƒˆã•ã‚ŒãŸimgã®ãƒ—ãƒãƒ‘ティã§ã€Loading Attributeを使ã£ã¦ç”»åƒã‚’é…延èªã¿è¾¼ã¿ã—よã†ã¨ã—ã¾ã—ãŸã€‚ Reactã§ã‚‚使ãˆãã†ã ã£ãŸã®ã§å®Ÿè£…ã—ã¦ã¿ãŸã¨ã“ã‚ã€imgプãƒãƒ‘ティã«åž‹å®šç¾©ãŒãªã„ã¨æ€’られã¾ã—ãŸã€‚ãã“ã§DefinitelyTypedã§ã€imgプãƒãƒ‘ティã®åž‹å®šç¾©ã‚’確èªã—ãŸã¨ã“ã‚ã€ã‚„ã¯ã‚Šã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚ DefinitelyTypedã‹ã‚‰å¼•ç”¨(2020/2/16) github.com プルリクエストをé€ã‚‹ã“ã¨ã‚‚考ãˆã¾ã—ãŸãŒã€è‰²ã€…調ã¹ãŸã¨ã“ã‚下記ã®ãƒ—ルリクエストを見ã¤ã‘ã¾ã—ãŸã€‚ github.com 上記リンクã®ã‚³ãƒ¡ãƒ³ãƒˆã‹ã‚‰ã®å¼•ç”¨ã§ã™ã€‚ We decided to not accept attributes
TypeScriptをプãƒãƒ€ã‚¯ãƒˆé–‹ç™ºã«ä½¿ã†ä¸Šã§ã®ãƒ™ã‚¹ãƒˆãƒ—ラクティスã¨å¿ƒå¾— - Qiita
åŒã˜TypeScriptã¨ã„ã†è¨€èªžã‚’利用ã™ã‚‹å ´åˆã«ãŠã„ã¦ã‚‚ã€ãƒˆãƒ©ãƒ³ã‚¹ãƒ‘イラã«ã‚ˆã£ã¦TypeScript自体ã®æ©Ÿèƒ½åˆ¶é™ãŒã‹ã‹ã£ãŸã‚Šã€æ€ã‚ã¬ãƒˆãƒ©ãƒ–ルを招ãå ´åˆãŒã‚ã‚Šã¾ã™ã€‚ãã‚Œãžã‚Œã®ãƒˆãƒ©ãƒ³ã‚¹ãƒ‘イラã®ç‰¹å¾´ã‚’è¸ã¾ãˆãŸä¸Šã§ã€ãã‚Œã«ã‚ˆã‚Šç”Ÿã˜ã‚‹å•é¡Œã‚‚見ã¦ã„ãã¾ã—ょã†ã€‚ 1-1. tsc TypeScriptã®é–‹ç™ºå…ƒã§ã‚ã‚‹Microsoftç´”æ£ã®TypeScriptトランスパイラã§ã™ã€‚TypeScriptを利用ã™ã‚‹éš›ã« typescript パッケージをインストールã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ãŒã€ãã‚Œã«åŒæ¢±ã•ã‚Œã¦ã„ã¾ã™ã€‚ å…¬å¼ãƒ„ールãªã ã‘ã‚ã£ã¦æœ€ã‚‚æ—©ã最新ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®TypeScriptã«å¯¾å¿œã—ãŸã‚Šã€è¨€èªžã™ã¹ã¦ã®æ©Ÿèƒ½ã‚’利用ã™ã‚‹ã“ã¨ãŒã§ãる一方ã§ã€ãƒãƒ³ãƒ‰ãƒ©ã§ã¯ãªã„ãŸã‚minifyã‚„chunkã®è¨å®šã¯ã§ãã¾ã›ã‚“。ã¾ãŸã€Path Aliasesã®æœªè§£æ±ºã‚„æ—§ESã¸ã®äº’æ›æ€§ãŒä¸å®Œå…¨ã§ã‚ã‚‹ã“ã¨ãŒæ¬ 点ã¨ã—ã¦æŒ™ã’られã¾ã™ã€‚ tsco
TypeScriptã®é–¢æ•°ã§DIパターン - id:anatooã®ãƒ–ãƒã‚°
Node.js+TypeScriptã§ãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ã‚’書ã„ã¦ã‚‹ã¨ã€DIパターンを使ã„ãŸã„å ´é¢ãŒçµæ§‹ã‚る。 ã„ã‚ゆるDIã¨è¨€ã†ã¨ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã‚¤ãƒ³ã‚¸ã‚§ã‚¯ã‚·ãƒ§ãƒ³ãªã©ã‚¯ãƒ©ã‚¹ã‚ã‚Šãã®æ–¹æ³•ãŒæ€ã„æµ®ã‹ã¶ã‘ã‚Œã©ã‚‚ã€å®Ÿéš›ã«ã¯é–¢æ•°ã§ã‚‚DIパターンを書ãã“ã¨ãŒã§ãる。å˜ç´”ã«é–¢æ•°ã®ãƒ‘ラメータã«ä¾å˜ã‚’å—ã‘å–ã‚Œã°ã‚ˆã„。 // ä¾å˜ã‚’表ç¾ã™ã‚‹åž‹ interface Deps { appService: AppServiceInterface; } // DIパターンを記述ã™ã‚‹é–¢æ•° function DoSomething({appService}: Deps, params: any) { ... } ä¾å˜ã‚’注入ã™ã‚‹å ´åˆã«ã¯ã€å¼•æ•°ã‚’部分é©ç”¨ã™ã‚‹bind()メソッドを使ã†ã€‚ // ä¾å˜ã‚’注入 const doSomething = DoSomething.bind(null, { appService: new MyAp
TypeScript入門『サãƒã‚¤ãƒãƒ«TypeScriptã€ã€œå®Ÿå‹™ã§ä½¿ã†ãªã‚‰æœ€ä½Žé™ã“ã“ã ã‘ã¯ãŠã•ãˆã¦ãŠããŸã„ã“ã¨ã€œ
本書『サãƒã‚¤ãƒãƒ«TypeScriptã€ã¯å®Ÿå‹™ã§TypeScriptを使ã†é–‹ç™ºè€…ã®ãŸã‚ã®å…¥é–€æ›¸ã§ã™ã€‚ãã—ã¦ã€ã“ã®ãƒšãƒ¼ã‚¸ã¯TypeScriptã®ç‰¹å¾´ã‚’最速ã§æŠŠæ¡ã§ãるよã†ã€æ•°ç™¾ãƒšãƒ¼ã‚¸ã‹ã‚‰ãªã‚‹æœ¬æ›¸ã®ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã‚’ã¤ã¾ã¿é£Ÿã„ã—ãŸè¦ç´„ã§ã™ã€‚ » 本書ã«ã¤ã„ã¦è©³ã—ã知る » ã¨ã«ã‹ã今ã™ãTypeScriptを書ã„ã¦ã¿ãŸã„ TypeScriptã¨ã¯â€‹JavaScriptã®ã‚¹ãƒ¼ãƒ‘ーセットã¨ãªã‚‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã€‚é™çš„型付ã‘言語ã§ã‚ã‚Šã€ãƒ—ãƒã‚°ãƒ©ãƒ ã®æ£ã—ã•ãŒé™çš„ã«æ¤œæŸ»ã§ãる。ライブラリやIDEãªã©ã®é–‹ç™ºç’°å¢ƒãŒå……実ã—ã¦ãŠã‚Šã€å¤§ããªã‚¨ã‚³ã‚·ã‚¹ãƒ†ãƒ ã‚’æŒã£ã¦ã„る。MicrosoftãŒ2012å¹´ã«é–‹ç™ºã—ã€ã‚ªãƒ¼ãƒ—ンソースã§å…¬é–‹ã—ãŸã€‚» TypeScriptã®ç‰¹å¾´ã«ã¤ã„ã¦è©³ã—ã知る » TypeScript誕生ã®èƒŒæ™¯ã«ã¤ã„ã¦è©³ã—ã知る TypeScriptã¯JavaScriptã®ã‚¹ãƒ¼ãƒ‘ーセット​スーパーセットã¨ã¯ã€å…ƒã®è¨€èªžã¨
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[TS] Non-null assertion operator ã‚’ç†è§£ã™ã‚‹
@types/react Cannot use React.memo with defaultProps · Issue #36320 · DefinitelyTyped/DefinitelyTyped
type-challenges/README.ja.md at main · type-challenges/type-challenges
GitHub - plantain-00/type-coverage: A CLI tool to check type coverage for typescript code
TSX内ã§ã‚¸ã‚§ãƒãƒªã‚¯ã‚¹ã®åž‹å¼•æ•°ã‚’1ã¤ã«ã™ã‚‹æ–¹æ³• - Qiita
Performance
Revisiting _ underscore for unused parameters: create `unused` type · Issue #29202 · microsoft/TypeScript
Typescript for Functional Programmers
Naming of TypeScript union and intersection types
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