Zhentiw - 博客园

2024年1月23日

[Typescript] Show the error close to where it's causes

摘要： Example code: const routingConfig = { routes: [ { path: "home", component: "HomeComponent", }, { path: "about", component: 12, }, { path: "contact", c 阅读全文

posted @ 2024-01-23 21:16 Zhentiw 阅读(13) 评论(0) 推荐(0)

[Design Pattern] Intro: Three groups of patterns

摘要： Creational patterns provide object creation mechanisms that increase flexibility and reuse of existing code. Factory method: Provides an interface for 阅读全文

posted @ 2024-01-23 15:11 Zhentiw 阅读(24) 评论(0) 推荐(0)

2024年1月22日

[Typescript 5.3] Switch true statement for type narrowing

摘要： class Fish { swim(): void {} } class Bird { fly(): void {} } switch(true) { case val instanceof Bird: val.fly() break case val instanceof Fish: val.sw 阅读全文

posted @ 2024-01-22 14:44 Zhentiw 阅读(8) 评论(0) 推荐(0)

[NodeJS] --env-file=.env

摘要： Normally you need to put require("dotenv").config() console.log(process.env.TEST) to access env vars WIth --node-fileflag you don't need to do that an 阅读全文

posted @ 2024-01-22 14:25 Zhentiw 阅读(51) 评论(0) 推荐(0)

[Typescript] Exercise: Template literals for generic

摘要： const interValueFromColor = <N extends string, C extends string, T extends number>(colorTag: `${N}-${C}-${T}`) => { const [namespace, color, tone] = c 阅读全文

posted @ 2024-01-22 03:08 Zhentiw 阅读(13) 评论(0) 推荐(0)

[Typescript 5.4] NoInfer

摘要： // Before declare function createFSM<TState extends string>(config: { // Without NoInfer, TS doesn't know which // TState is the source of truth initi 阅读全文

posted @ 2024-01-22 03:03 Zhentiw 阅读(32) 评论(0) 推荐(0)

[Typescript] Exercise: const T

摘要： // Before declare function useState<T>(status: T[]): T; const loadingStatus = useState(["loading", "idle"]) // string type // after declare function u 阅读全文

posted @ 2024-01-22 02:57 Zhentiw 阅读(14) 评论(0) 推荐(0)

[Typescript] Execrise: Possible routes type

摘要： const routes = { user: ["get-user", "get-all-users"], comment: ["get-comment", "get-all-comments"] } as const type Routes = typeof routes type Possibl 阅读全文

posted @ 2024-01-22 02:52 Zhentiw 阅读(15) 评论(0) 推荐(0)

2024年1月17日

[Typescript 5] override keyword

摘要： Overrides A common mistake, that has historically been difficult for TypeScript to assist with is typos when overriding a class method class Car { hon 阅读全文

posted @ 2024-01-17 11:13 Zhentiw 阅读(22) 评论(0) 推荐(0)

2024年1月16日

[Typescript] Private field presents check

摘要： JS private field #serialNumbercannot be accessed outside class. But within class, it is accessible. JS private field can also be used to check class i 阅读全文

posted @ 2024-01-16 16:45 Zhentiw 阅读(16) 评论(0) 推荐(0)

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