随笔分类 - TypeScript
摘要：const requestFullscreenProps = [ "requestFullScreen", "webkitRequestFullScreen", "mozRequestFullScreen", "msRequestFullScreen", ] as const; const exit
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摘要：Consider this Result type: type Result<TResult, TError> = | { success: true; data: TResult; } | { success: false; error: TError; }; The Result type ha
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摘要：Consider this package.json file: { "name": "exercise", "version": "1.0.0", "main": "index.js", "scripts": { "dev": "run-p dev:*", "dev:client": "tsc -
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摘要：A long-awaited feature is smart incremental builds for TypeScript projects. In 3.0 you can use the --build flag with tsc. This is effectively a new en
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摘要：export const randomColor = () => { return "#" + Math.random().toString(16).substring(2, 8).padEnd(6, '0') } export const randomString = (len: number)
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摘要：The solution is to modify the tsconfig.json file to enable declarationMap under the compilerOptions. // inside tsconfig.json { "compilerOptions": { "d
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摘要：One of the interesting things about verbatimModuleSyntax in TypeScript is that it requires a specific type of import when you're working with types. L
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摘要：To fix the CommonJS export issue, we need to make a change to our tsconfig.json file. Add the verbatimModuleSyntax setting and set it to true: { "comp
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摘要：The module and moduleResolution options in the tsconfig.json file can be confusing. Here we'll discuss the differences between the module and moduleRe
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摘要：Here we're attempting to import several PNG files into our TypeScript program: import pngUrl1 from "./example1.png"; // red squiggly line under "./exa
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摘要：Here we're importing a function myModuleFunc from my-module: import { myModuleFunc } from "my-module"; // red squiggly line under "my-module" Let's st
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摘要：In tsconfig file, you have targetand libsconfiguration. You always need to define a target, recommended as es2022 Specifying the lib option also lets
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摘要：The declare keyword in TypeScript allows you to specify types for global variables. Whenever you use it, an ambient context is created, which means th
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摘要：Typescript check a file whether it contains any export/import, if it is, then it's a module; if not then it's a script. What's the difference between
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摘要：/** * How do we annotate the errors this function throws? */ type PossibleErrors = SyntaxError | DOMException; const getUserFromLocalStorage = (id: st
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摘要：For the following code: const objOfFunctions = { string: (input: string) => input.toUpperCase(), number: (input: number) => input.toFixed(2), boolean:
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摘要：import { expect, it, vitest } from 'vitest'; const logId = (obj: { id: string }) => { console.log(obj.id); }; const logName = (obj: { name: string })
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摘要：Make those pass: import { Equal, Expect } from "@total-typescript/helpers"; type Event = "click" | "hover" | "scroll"; type CallbackType = unknown; co
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摘要：function pipe<A, B>(fn: (a: A) => B) { function run(a: A) { return fn(a) } run.pipe = <C, >(fn2: (b: B) => C) => pipe((a: A) => fn2(fn(a))) return run
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摘要：type BaseTable = { [colName: string]: string | number | boolean; } type Columns<Tables extends { [tableName: string]: BaseTable }> = { [K in keyof Tab
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