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...
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<string>; console.log(keys)...
Object.keys类型错误,返回string[],而不是参数的键。因此,crypto不能保证是cryptos的密钥。规避这一点的一种方法是使用Object.keys: (Object.keys(cryptos) as keyof typeof cryptos).map(...) 或者,只需使用Object.entries遍历键和值: Object.entries(cryptos).map(([key, value], index) => ( <li k...
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 ...
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...
createItems<Type extends (DefinedComponentType | Component)>(items: Item<Type>[]) {} createItems([ { type: 'input', props: { readonly: false } }, { type: 'select', props: { options: [] } } ])</code></pre><p>这里 <code>createItems</code> 中的 <code>props<...
type DeepKeys<T> = T extends object ? ( { [K in (string | number) & keyof T]: `${( `.${K}` | (`${K}` extends `${number}` ? `[${K}]` : never) )}${"" | DeepKeys<T[K]>}` }[ (string | number) & keyof T] ) : never 这是一种分布式对象类型(如microsoft/Ty...
interface SquareConfig {color?: string;width?: number;}function createSquare(config: SquareConfig): {color: string; area: number} {let newSquare = {color: "white", area: 100};if (config.clor) {// Error: Property 'clor' does not exist on type 'SquareConfig'newSquare.color = config.co...
Introducing TypeScript into your JavaScript app introduces some rigidity to your code - you lose the complete flexibility of JavaScript, but gain a lot of
('**/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...