functiontest<Textends{new(...args:any[]):{}}>(target:T){returnclassextendstarget{name:string='yangbuyiya';age:number=18;}}@testclassPerson{}letp=newPerson();console.log(p); image-20211205221201403 defineProperty 什么是 defineProperty TypeScript的Object.defineProperty是一种用于在对象上定义属性的...
classMyClass{private_name:string;private_age:number;constructor(name:string,age:number){this._name=name;this._age=age;Object.defineProperty(this,'age',{get:function(){returnthis._age;},enumerable:true,configurable:true});}// getter and setter methodsgetname():string{returnthis._name;}setname...
function test<T extends { new(...args: any[]): {} }>(target: T) {return class extends target {name: string = 'yangbuyiya';age: number = 18;}}@testclass Person {}let p = new Person();console.log(p); defineProperty 什么是 defineProperty TypeScript的Object.defineProperty是一种用于在...
包含”extends”子句的类被称为派生类(derived class),“extends“子句中指定的类是派生类的基类(base class)。当一个类继承规范省略了”extends“子句时,此类就没有基类。 类继承指定必须满足以下约束,否则会出现编译时报错。 如果”extend“子句指定了类型引用,那么此类型必须为类类型。此外,当作为表达式计算时,此...
constnameDecorate:PropertyDecorator=(target:Object,propertyKey:string|symbol)=>{letvalue:string Object.defineProperty(target,propertyKey,{set:(v)=>{value=v},get:()=>{return'寒冰射手'+value}})}classHero{@nameDecoratename:string}lethb=newHero()hb.name='艾希'console.log(hb.name); ...
兼收并蓄 TypeScript - 类: object 兼收并蓄 TypeScript - 类: object 示例如下: class\object.ts {// 定义对象时省略属性名constname ="webabcd";constage =40;consta = {name, age};// 定义对象时省略属性名(其属性名默认为变量名称)constb = {name: name,age: age};// 这是 es5 写法,等价...
核心思路如下：就是依靠 return this as NEW_TYPE 来对类型进行改变。但要注意的是，zoo的类型一旦定...
TypeScript之defineProperty实现数据绑定 一:绑定类 class CommonTools { public static watch<T>(obj: Object, name: string, callback: ($data: T) => void, init: boolean = true): void { let $value: T = obj[name] as T; Object.defineProperty(obj, name, {...
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __()); }; })(); // 定义类 var Animal = /** @class */ (function () { function Animal() { } Animal.prototype.move = function (distanceInMeters) { ...
// 安装reflect-metadata库 npm install --save @types/reflect-metadata reflect-metadata // 使用装饰器 import 'reflect-metadata'; // 定义一个装饰器函数 function readonly(target: any, key: string) { Object.defineProperty(target, key, { get() { return this[key]; }, set(this: any, value:...