functionlogProperty(target:any,key:string){deletetarget[key];constbackingField="_"+key;Object.defineProperty(target,backingField,{writable:true,enumerable:true,configurable:true});// property getterconstgetter=function(this:any){constcurrVal=this[backingField];console.log(`Get:${key}=>${currVal}`);r...
functionuseRef<T>(initialValue: T): MutableRefObject<T>;//convenience overload for refs given as a ref prop as they typically start with a null value/** * `useRef` returns a mutable ref object whose `.current` property is initialized to the passed argument * (`initialValue`). The return...
遍历执行 camelizeif(Array.isArray(obj)){returnobj.map(item=>camelize(item));// 如果是对象}elseif(isPlainObjectX(obj)){constnewObj=Object.create(null);Object.keys(obj).forEach(key=>{// 将 key 改为驼峰,对 value 递归
export interface Interface {/*** Shortest name: {@link InterfaceL1.(:STRING_INDEXER)}* Full name: {@link (InterfaceL1:interface).(:STRING_INDEXER)}** {@label STRING_INDEXER}*/[key: string]: number;/*** Shortest name: {@link InterfaceL1.(:NUMBER_INDEXER)}* Full name: {@link (Inter...
classX{publicname:string=''}letx: X = {name:'x'};console.log(x.name);lety = ['a','b','c'];console.log(y[2]);// 在需要通过非标识符(即不同类型的key)获取数据的场景中,使用Map< Object, some_type >。letz =newMap<Object,string>(); ...
// 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) {
(常见的) */objArr: {id: string;title: string;}[];/** 具有任意数量的相同类型属性的 dict 对象 */dict1: {[key: string]: MyTypeHere;};dict2: Record<string, MyTypeHere>; // 相当于 dict1/** 任何函数,只要你不调用它(不推荐) */onSomething: Function;/** 不接受或不返回任何内容的...
classPoint{x:number;y:number;// Normal signature with defaultsconstructor(x=0,y=0){this.x=x;this.y=y;}} class Point { // Overloads constructor(x: number, y: string); constructor(s: string); constructor(xs: any, y?: any) { ...
泛型泛型主要是为了解决类型复用的问题。可以说泛型给了你在使用 ts 类型检测的体验同时,又提供了很好的类型扩展性、可维护性。在使用泛型类型时,可以将泛...
If the only known fact about the type is that it's some object, use the type object, not Object or { [key: string]: any }. var foo: string | any: When any is used in a union type, the resulting type is still any. So, while the string portion of this type annotation may ...