class Derived extends Base { getName() { return "world"; }} const d = new Derived();d.printName();注意，如果我们忘记实现基类的抽象成员，我们会得到一个报错：class Derived extends Base {// Non-abstract class 'Derived' does not implement inherited abstract member 'getName' from class...
getPaddingString(): string; } class SpaceRepeatingPadder implements Padder { constructor(private numSpaces: number) {} getPaddingString() { return Array(this.numSpaces + 1).join(" "); } } class StringPadder implements Padder { constructor(private value: string) {} getPaddingString() { retur...
The members of a class (properties & methods) are typed using type annotations, similar to variables. ExampleGet your own TypeScript Server classPerson { name: string; } constperson =newPerson(); person.name="Jane"; Try it Yourself » ...
getName() { return this.name } } let boy = new Boy() console.log(boy.getName()) // human 静态属性 属性前加上static关键字,就表示该属性不会被实例继承。 静态属性只能通过类来访问 class Animal { static num = 42; constructor() { // ... } } console.log(Animal.num); // 42 const ...
build: { babel: { plugins: [ ["@babel/plugin-proposal-decorators", { legacy: true }], ["@babel/plugin-proposal-class-properties", { loose: true }] ] }, } ↑ nuxt.config.js 在Antony-Nuxt 中做了 SSR 服务端渲染支持,由后端异步请求数据后再渲染页面,其需要用到 async 函数 (http://www...
Uncapitalize<StringType>:将字符串首字母转为小写格式 type UppercaseGreeting = "HELLO WORLD"; type UncomfortableGreeting = Uncapitalize<UppercaseGreeting>; // 相当于 type UncomfortableGreeting = "hELLO WORLD" typescript 本文系转载,阅读原文 https://zhuanlan.zhihu.com/p/640499290 ...
classPoint{publicx:number=0publicy:number=0constructor(x:number, y:number){this.x = x;this.y = y; } }// 无法从对象中删除某个属性,从而确保所有Point对象都具有属性xletp1 =newPoint(1.0,1.0);deletep1.x;// 在TypeScript和ArkTS中,都会产生编译时错误delete(p1asany).x;// 在TypeScript中不...
classPerson{name:string;constructor(name:string){this.name=name;}@loggedMethodgreet(){console.log(`Hello, my name is${this.name}.`);}}constp=newPerson("Ray");p.greet(); 输出如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ...
Back when TypeScript first introduced index signatures, you could only get properties declared by them with “bracketed” element access syntax like person["name"]. Copy interface SomeType { /** This is an index signature. */ [propName: string]: any; } function doStuff(value: SomeType) {...
/*** Represents a book in the catalog.* @public*/export class Book {/*** The title of the book.* @beta*/public get title(): string;/*** The author of the book.*/public get author(): string;}; 在这个例子中,Book.author从包含它的类继承了它的@public名称,而Book.title被标记为“...