target: Object, propertyName: string, propertyDescriptor: PropertyDescriptor): PropertyDescriptor { const method = propertyDescriptor.value; propertyDescriptor.value = function(...args) { console.time(propertyName); const result = method.apply(this, args); console.timeEnd(propertyName); return result; ...
console.log("Howdy, " + this.getName()); } } const g = new SpecialGreeter(); g.greet(); // OK g.getName(); //Property 'getName' is protected and only accessible within class 'Greeter' and its subclasses. 导出protected成员 派生类需要遵循其基类契约,但可以选择公开具有更多功能的基类子...
type Name=string;typeNameResolver=()=>string;type NameOrResolver=Name|NameResolver;functiongetName(n:NameOrResolver):Name{if(typeofn==='string'){returnn}else{reutrnn()}} 类型Name其实就是string的别名,类型() => string,一个函数返回一个字符串,这种格式就是类型NameResolver,NameOrResolver是一个...
let passcode = "hello angular 5"; class Employee { private _fullName: string; get fullName(): string { return this._fullName; } set fullName(newName: string) { if (passcode && passcode == "hello angular 5") { this._fullName = newName; } else { console.log("Error: Unauthorized...
显示注解类型,语法:value:type告诉类型检查器,这个 value 类型是 type。请看示例: <template> <p>{{ a }}</p> <p>{{ b }}</p> <p>{{ c }}</p> </template> <script lang="ts"setup name="App">//显示注解类型let a: number =1//a 是数字let b:string='hello'//b 是字符串let c:...
foo.bam.baz; // ^^^ error: property access implicitly returns any // ^ error: variable declaration implicitly typed as any const z: string = x.foo.bam.baz; // ^^^ error: property access implicitly returns any const { baz } = x.foo.bam; // ^^^ error: property access implicitly ...
import{ serialize, jsonify }from"./serializer";classPerson{firstName:string;lastName:string;@serializeage:number@serializegetfullName() {return`${this.firstName}${this.lastName}`; }toJSON() {returnjsonify(this) }constructor(firstName:string,lastName:string,age:number) {// ......
get: getter, set: setter, enumerable: true, configurable: true }); } class Person { @logProperty public name: string; constructor(name : string) { this.name = name; } } const p1 = new Person("semlinker"); p1.name = "kakuqo"; ...
vuex-module-decorators: 用 typescript 写 vuex 很好用的一个库import { Module, VuexModule, Mutation, Action, MutationAction, getModule } from 'vuex-module-decorators' 组件声明 创建组件的方式变成如下 代码语言:javascript 代码运行次数:0 运行
setFontColorFromString(color: string) { fontColor = color;// compile time error if (!(CssColor.test(color))) return; fontColor = color;// correct } Type gurard for index type let collection: UsersCollection; getUserByEmail(email: string) { collection[email];// type is any if (/^[...