Connect, collaborate, and grow with a community of TypeScript developers. Elevate your skills through interactive coding challenges, discussions, and knowledge sharing
TypeHero
Connect, collaborate, and grow with a community of TypeScript developers. Elevate your skills through interactive coding challenges, discussions, and knowledge sharing
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TypeScript以外ãŒå«Œã„ã§ã™
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Open source hooliganism and the TypeScript meltdown
September 7, 2023 Open source hooliganism and the TypeScript meltdown I've seen a lot of true believers argue for virtues of their favorite paradigms and methods over the decades working in software. And mostly, I look at people with a passionate preference and smile. Isn't it great that people care so much about their craft that they volunteer to extol the benefits of their favorite tools! Yes it
My new error...
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JavaScript ã® undefined 㨠null を完全ã«ç†è§£ã™ã‚‹
JavaScript ã§é »å‡ºã™ã‚‹ undefined 㨠null ã«ã¤ã„ã¦èªžã‚Šã¾ã™ã€‚ 言語仕様上ã®é•ã„ JavaScript (ECMAScript) ã«ãŠã„ã¦ã€ä»•æ§˜ä¸Š undefined 㨠null ã¯å½“然ãªãŒã‚‰æ˜Žç¢ºã«åŒºåˆ¥ã•ã‚Œã¦ã„ã¾ã™ã€‚ã„ãã¤ã‹è¨€èªžä»•æ§˜ä¸Šã®æ‰±ã„ã«ã¤ã„ã¦æŒ™ã’ã¦ã¿ã¾ã™ã€‚ 比較 厳密ãªæ¯”較演算å === ã«ãŠã„㦠undefined 㨠null ã¯åŒºåˆ¥ã•ã‚Œã¾ã™ã€‚ゆるã„比較演算å == ã«ãŠã„ã¦ã¯ä¸¡è€…ã¯åŒºåˆ¥ã•ã‚Œã¾ã›ã‚“（仕様 7.2.14）。 console.log(undefined === null); // false console.log(undefined == null); // true
2022年秋版　最新React/Typescript開発環境ã®ä½œæˆ - Qiita
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JavaScriptã§ã‚«ã‚¹ã‚¿ãƒ 例外クラスを作りãŸã„ãªã¨æ€ã£ãŸã‚‰ã€ ã‚ã‚“ã©ã†ã ã£ãŸã®ã§ã€ãã®æ™‚調ã¹ãŸã¨ãã®å‚™å¿˜éŒ²ã€‚ 以下ãŒã™ã”ãå‚考ã«ãªã£ãŸ(´ω｀) ãƒ»ä¾‹å¤–å‡¦ç† â€” 仕事ã§ã™ãã«ä½¿ãˆã‚‹TypeScript ドã‚ュメント カスタム例外 ã“ã‚“ãªæ„Ÿã˜ã€‚ export class CustomError extends Error { constructor(e?: string) { super(e); this.name = new.target.name; // Maintains proper stack trace for where our error was thrown (only available on V8) if (Error.captureStackTrace) { Error.captureStackTrace(this, this.constructor); } //
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State of JS 2020
As crappy as 2020 was, JavaScript as a whole still managed to somehow move forward. As the language itself keeps improving thanks to new features like Optional Chaining and Nullish Coalescing, TypeScript's widespread adoption is taking things to a whole other level by popularizing static typing. And on the framework side, just when we thought things were settling down, Svelte comes in and shakes e
The State of JS 2021
多ãã®ã“ã¨ãŒã‚ã£ãŸ2021å¹´ã§ã—ãŸã€‚本当ã«ã€‚ã“ã®ã‚¢ãƒ³ã‚±ãƒ¼ãƒˆã ã£ã¦2022å¹´ã«å»¶ã³ã¦ã—ã¾ã£ãŸã‚“ã§ã™ã‹ã‚‰ï¼ より高速ãªãƒ“ルドツールや新ã—ã„ãƒãƒƒã‚¯ã‚¨ãƒ³ãƒ‰ãƒ•ãƒ¬ãƒ¼ãƒ ワークãªã©ã€JavaScriptã¯é€²åŒ–ã—続ã‘ã¦ã„ã¾ã™ã€‚ç§ãŸã¡ã‚‚ベストを尽ãã—ã€æ–°ã—ã„質å•å½¢å¼ã‚„ã€2ã¤ã®ãƒ‡ãƒ¼ã‚¿ãƒã‚¤ãƒ³ãƒˆã®ç›¸äº’å‚照機能（年åŽÃ—経験レベルãªã©ï¼‰ã€ãã—ã¦ãƒãƒ£ãƒ¼ãƒˆã®ã‚«ã‚¹ã‚¿ãƒžã‚¤ã‚ºæ©Ÿèƒ½ã¨ã€ã“ã®ã‚¢ãƒ³ã‚±ãƒ¼ãƒˆã«ãƒ‘ワーアップを施ã—ã¾ã—ãŸï¼ã»ã‹ã«ã‚‚ã‚ã‚‹ã®ã§ã€[新機能ã®ã¾ã¨ã‚]](https://dev.to/sachagreif/whats-new-in-the-2021-state-of-javascript-survey-4eej)ã‚’èªã‚“ã§ã¿ã¦ãã ã•ã„（英語）。 ã™ã¹ã¦ãŒé †é¢¨æº€å¸†ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚悪ã„ã“ã¨ãŒèµ·ã“ã£ã¦ãªã•ãã†ãªã®ãŒå¹¸ã„ã§ã™ãŒã€ãƒ‡ãƒ¼ã‚¿æ¼æ´©ã«å¯¾å¿œã—ãªã„ã¨ã„ã‘ã¾ã›ã‚“ã§ã—ãŸã€‚ã¾ãŸå¼•ã続ãã€ã“ã®ã‚¢ãƒ³ã‚±ãƒ¼ãƒˆã‚’より包括的ã«ã€ã‚¢ã‚¯ã‚»ã‚·ãƒ–ル
Types vs. interfaces in TypeScript - LogRocket Blog
Leonardo Maldonado Follow Fullstack developer. JavaScript, React, TypeScript, GraphQL. The idea of having static type-checking in JavaScript is really fantastic and the adoption of TypeScript is growing more every day. You started to use TypeScript in your project, you created your first type, then you jumped to your first interface, and you got it working. You concluded that TypeScript, in fact,
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より良ã„ReactJS開発者ã«ãªã‚‹ãŸã‚ã®10ã®ãƒ’ントã¨ã‚³ãƒ„ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? 本記事ã¯ã€Simon Holdorfæ°ã«ã‚ˆã‚‹ã€Œ10 Tips and Tricks That Will Make You a Better ReactJS Devã€ï¼ˆ2021å¹´4月4日公開）ã®å’Œè¨³ã‚’ã€è‘—者ã®è¨±å¯ã‚’å¾—ã¦æŽ²è¼‰ã—ã¦ã„ã‚‹ã‚‚ã®ã§ã™ã€‚ より良ã„ReactJS開発者ã«ãªã‚‹ãŸã‚ã®10ã®ãƒ’ントã¨ã‚³ãƒ„ より良ã„React開発者ã«ãªã‚Šã€ã‚ˆã‚Šå„ªã‚ŒãŸã‚³ãƒ¼ãƒ‰ã‚’書ãã€ã‚³ãƒ¼ãƒ‡ã‚£ãƒ³ã‚°é¢æŽ¥ã§æŠœã出るãŸã‚ã€Reactã®æŠ€é‡ã‚’改善ã™ã‚‹ã™ãã«ä½¿ãˆã‚‹çŸ¥è˜ã§ã™ã€‚ ã•ã‚ã€çš†ã•ã‚“。始ã‚ã¾ã—ょã†ã€‚ 1. Reactフックを使ã£ãŸé–¢æ•°ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆ フックã¯React v1
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Google TypeScript Style Guide
// Good: choose between two options as appropriate (see below). import * as ng from '@angular/core'; import {Foo} from './foo'; // Only when needed: default imports. import Button from 'Button'; // Sometimes needed to import libraries for their side effects: import 'jasmine'; import '@polymer/paper-button'; Import paths TypeScript code must use paths to import other TypeScript code. Paths may be r
Effective TypeScript › The Golden Rule of Generics
The New TypeScript Handbook has some real gems in it. Here's what it has to say about generics: Writing generic functions is fun, and it can be easy to get carried away with type parameters. Having too many type parameters or using constraints where they aren't needed can make inference less successful, frustrating callers of your function. It goes on to offer a few specific pieces of advice about
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