const keys = Object.keys(data) as Array<string>; 现在,我们可以使用keys变量来访问data对象的属性名称数组,并且TypeScript会在编译时进行类型检查。 完整的代码示例: 代码语言:txt 复制 import data from './data.json'; const keys = Object.keys(data) as Array<
b:'2'}vargetPropertyValue = Object.keys(foo).map(item =>foo[item]) //这里会有typescript的错误提示 错误场景2 varfoo ={ a:'1', b:'2'}functiongetPropertyValue(obj,key) { //这里也会提示obj会有any类型returnobj[key] } 场景1解决方案: 通过keyof的方式可以获取ts 类型的属性key的值 varfoo...
The looseness of Object.keys can be a real pain point when using TypeScript. Luckily, it's pretty simple to create a tighter version using generics and the keyof operator. exportconstmyObject={a:1,b:2,c:"3"}Object.keys(myObject).forEach((key)=>{console.log(myObject[key])}) This ...
typeUser={name:string;age:number};typeKeys=keyofUser;// "name" | "age" 1. 2. ✅ 索引访问类型(T[K]) 通过T[K]可以访问某个对象属性的类型: typeNameType=User['name'];// string 1. 结合以上三种机制,我们可以重构之前的getProperty函数,使其具备类型推导能力: functiongetProperty<Textendsobject,...
Object.keys迭代导致Typescript错误“元素隐式具有'any‘类型，因为索引表达式不是’number‘类型”Type...
// Create new property with getter and setter Object.defineProperty(target, key, { get: getter, set: setter, enumerable: true, configurable: true }); } class Person { @logProperty public name: string; constructor(name : string) {
functionomit<Textendsobject,KextendskeyofT>(obj:T,keys:K[]):Omit<T,K>{constresult={...obj};keys.forEach((key)=>deleteresult[key]);returnresult;} 1. 2. 3. 4. 5. 此时,omit(user, ['password'])的返回类型应为{ id: number; name: string; createdAt: Date },但这依赖于Omit类型工具...
('**/package-lock.json') }} restore-keys: | ${{ runner.os }}-node- # github-script action: https://github.com/actions/github-script # 在 workflow 中使用 Script 语法调用 Github API 或引用 workflow context # setup-node action: https://github.com/actions/setup-node # 配置 Node 执行...
Introducing TypeScript into your JavaScript app introduces some rigidity to your code - you lose the complete flexibility of JavaScript, but gain a lot of
Compose object types containing mutually exclusive keys, using this generic Typescript utility type. - maninak/ts-xor