显式类型转换:如果你确定将"{ [x: string]: string; }"转换为"Record"是安全的,可以使用类型断言或类型转换来解决类型不匹配的问题。例如: 代码语言:txt 复制 const obj: { [x: string]: string; } = { name: 'John', age: '30' }; const record: Reco...
我有一个接口MyInterface和一个指向该接口的常量/只读字符串键字典。interface MyInterface { someProp: number;}const MyObj: Record<string, MyInterface> = { myKey1: { someProp: 1 }, myKey2:...
Record<Keys, Type> Constructs an object type whose property keys are Keys and whose property values are Type. This utility can be used to map the properties of a type to another type. google的描述: The Record type in TypeScript is used to create a dictionary of key-value pairs, where t...
type Record = { [P in K]: T; }; 作用是构建一个类型,这个类型用来描述一个对象,这个对象的属性都具有相同的类型 使用举例 export const student1: Record<string, any> = {name: ‘张三’,age: 20} Record应该是日常使用频率较高的内置类型了,主要用来描述对象,一般建议是不用Object来描述对象,而是用R...
interfaceEmployeeType{id:numberfullname:stringrole:string}letemployees:Record<number,EmployeeType>={0:{id:1,fullname:"John Doe",role:"Designer"},1:{id:2,fullname:"Ibrahima Fall",role:"Developer"},2:{id:3,fullname:"Sara Duckson",role:"Developer"},}// 0: { id: 1, fullname: "John...
【TypeScript】TypeScript之Record的用法 - 掘金 (juejin.cn) 比如我需要一个cats对象,这个对象里有三个不同的属性,且属性的值必须是数字和字符串 那么可以这样写: interface CatInfo { age: number; breed: string; } type CatName= "mincat" | "licat" | "mordred"; ...
type proxyKType = Record<K,T> 1. 会将K中的所有属性值都转换为T类型,并将返回的新类型返回给proxyKType,K可以是联合类型、对象、枚举… 看几个demo. demo1: type petsGroup = 'dog' | 'cat' | 'fish'; interface IPetInfo { name:string, ...
记录一下typescript中一些类型高级用法: 首先声明一个类型IUser: interface IUser { name: string; age?: number; class?: string; sex: string; } 1、keyof:作用是获取键 type keys = keyof IUser; 2、Pick:从类型定义的属性中,选取指定一组属性,返回一个新的类型定义。
首先,我们需要定义 Record 类型。Record 是 TypeScript 中的一种内置泛型,它可以定义一个对象的具体类型。 typeUserRecord=Record<string,any>;/** * UserRecord 类型表示一个对象,它可以包含任意数量的键(字符串类型) * 键对应的值的类型是任意类型(any) ...
Bug Report When creating a object with symbols for keys and explicitly telling typescript the object should be of type Record<string, string>. Typescript fails to throw an error. Is does however throw an error when you use the symbol to ...