Zhentiw - 博客园

2020年10月6日

[Typescript] Discriminated (Tagged) Unions

摘要： Discriminated (Tagged) Unions means that for two or more similar types, we have one common prop which can differentiate individual. interface Order { 阅读全文

posted @ 2020-10-06 15:27 Zhentiw 阅读(279) 评论(0) 推荐(0)

[Typescript] Intersections types

摘要： interface Order { id: string; amount: number; currency: string; } interface Stripe { card: string; cvc: string; } interface PayPal { email: string; } 阅读全文

posted @ 2020-10-06 15:18 Zhentiw 阅读(79) 评论(0) 推荐(0)

2020年10月5日

[Typescript] Performance Bundling and tslib

摘要： When we use class extend in typescript: // app.ts export default class App {} // bar.ts export defulat class Bar extends App { } After compiling, we w 阅读全文

posted @ 2020-10-05 18:29 Zhentiw 阅读(82) 评论(0) 推荐(0)

[Typescript] Enforcing Code Quality

摘要： tsconfig.json: { "compilerOptions": { "target": "es5", "lib": ["es6", "dom"], "module": "commonjs", "outDir": "dist", "noUnusedLocals": true, "noUnuse 阅读全文

posted @ 2020-10-05 18:11 Zhentiw 阅读(109) 评论(0) 推荐(0)

[Typescript] Understanding “lib” and ES libraries

摘要： Sometime if our tsconfig.json looks like this; { "compilerOptions": { "target": "es5", "module": "commonjs", "outDir": "dist" } } We can get all kinds 阅读全文

posted @ 2020-10-05 17:46 Zhentiw 阅读(200) 评论(0) 推荐(0)

[Typescript] Configuration Inheritance with Extends

摘要： tsconfig-base.json: { "compilerOptions": { "target": "es5", "module": "commonjs", "lib": ["dom", "es6"], "outDir": "dist", "noImplicitAny": false } } 阅读全文

posted @ 2020-10-05 03:03 Zhentiw 阅读(97) 评论(0) 推荐(0)

2020年10月4日

[Typescript] User defined type guards

摘要： class Song { constructor(public title: string, public duration: number) { } } class Playlist { constructor(public name: string, public songs: Song[]) 阅读全文

posted @ 2020-10-04 01:22 Zhentiw 阅读(133) 评论(0) 推荐(0)

[TypeScript] instanceof and Type Guards (getPrototypeOf)

摘要： class Foo { bar() {} } const bar = new Foo() console.log(bar instanceof Foo) // true console.log(Object.getPrototypeOf(bar) Foo.prototype) // true cla 阅读全文

posted @ 2020-10-04 01:16 Zhentiw 阅读(114) 评论(0) 推荐(0)

2020年10月1日

[Typescript] “Record” Mapped Type

摘要： "Record" repersent key-value pair. type MyRecord<K extend string, T> = { [P in K]: T } Record key should be string. array[0] in javascript, even we gi 阅读全文

posted @ 2020-10-01 19:01 Zhentiw 阅读(203) 评论(0) 推荐(0)

[Typescript] “Required” Mapped Type, +/- Modifiers

摘要： For example we have interface: interface Person { name: string, age?: number } 'age' is an optional prop. // will have an error since person.age is us 阅读全文

posted @ 2020-10-01 18:50 Zhentiw 阅读(133) 评论(0) 推荐(0)

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