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We have a type Route that is a discriminated union of the possible routes in the application. Each route has the properties search and route type Rout 阅读全文
posted @ 2022-12-13 15:26
Zhentiw
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Let's say we have: type Fruit = "apple" | "banana" | "orange"; We only want AppleOrBanana If we do as such: type Fruit = "apple" | "banana" | "orange" 阅读全文
posted @ 2022-12-12 15:52
Zhentiw
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Let's imagine you're building a type helper to extract out the value from several different 'parsers'. const parser1 = { parse: () => 1, }; const pars 阅读全文
posted @ 2022-12-12 15:40
Zhentiw
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Example 1 import { S } from "ts-toolbelt"; import { Equal, Expect } from "../helpers/type-utils"; type Names = [ "Matt Pocock", "Jimi Hendrix", "Eric 阅读全文
posted @ 2022-12-12 15:20
Zhentiw
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In this exercise we have an interface MyComplexInterface which is acting as a type helper. The interface takes arguments for Event, Context, Name, and 阅读全文
posted @ 2022-12-12 15:08
Zhentiw
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import { Equal, Expect } from "../helpers/type-utils"; type GetPropValue< T extends Record<PropertyKey, any>, P extends keyof T = "data" > = T extends 阅读全文
posted @ 2022-12-11 22:33
Zhentiw
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type NonEmptyArray<T> = [T, ...Array<T>]; export const makeEnum = (values: NonEmptyArray<string>) => {}; makeEnum(["a"]); makeEnum(["a", "b", "c"]); / 阅读全文
posted @ 2022-12-11 22:16
Zhentiw
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export type Maybe<T extends {}> = T | null | undefined; type tests = [ // @ts-expect-error Maybe<null>, // @ts-expect-error Maybe<undefined>, Maybe<st 阅读全文
posted @ 2022-12-11 22:11
Zhentiw
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import { Equal, Expect } from "../helpers/type-utils"; type Maybe<T> = T | null | undefined; type tests = [ Expect<Equal<Maybe<string>, string | null 阅读全文
posted @ 2022-12-11 22:03
Zhentiw
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import { Equal, Expect } from "../helpers/type-utils"; type Identity<T> = T; type tests = [ Expect<Equal<Identity<1>, 1>>, Expect<Equal<Identity<"1">, 阅读全文
posted @ 2022-12-11 22:01
Zhentiw
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