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hry-types

v0.20.3

Published

typescript工具类型库

Readme

简介

特点

  • 项目中注释和文档等全部使用中文。

  • 严格泛型与宽泛泛型 对于需要校验参数类型的泛型,提供两个版本:原泛型负责对外提供严格的参数约束,带下划线前缀的泛型去除参数约束,用于其他泛型内部组合。严格版本统一转发给宽泛版本实现。

    import type { _MergeUnion, MergeUnion } from "hry-types";
    
    type User = { id: string };
    type Admin = { id: number; name: string };
    
    // 对外使用严格版本,传入参数会进行普通对象校验
    type UserAndAdmin = MergeUnion<User, Admin>;
    
    // 其他泛型内部已经完成参数校验时,使用宽泛版本避免中间类型再次触发约束
    type MergeResult<T, U> = _MergeUnion<T, U>;

    宽泛版本使用单个下划线前缀,严格版本和宽泛版本的实现保持一致。下划线版本主要用于类型工具之间的组合,直接对外使用时应优先选择严格版本。

安装

pnpm add hry-types -D

tsconfig

// tsconfig.json
{
  "compilerOptions": {
    // ...
    "types": ["hry-types"]
  }
}

使用示例

import { type A } from "hry-types";
import type { IfEquals } from "hry-types/src/Any/IfEquals";

type foo<T extends string | number> = A.IfEquals<T, string, "string", "number">;
// type foo<T extends string | number> = IfEquals<T, string, "string", "number">

type test = foo<string>; // test => 'string'

type test2 = foo<number>; // test2 => 'number'