1、使用private关键字:在类的属性名前加上private关键字,该属性将成为私有属性,只能在类的内部访问。 class MyClass { private myPrivateProperty: string; constructor() { this.myPrivateProperty = "Hello, World!"; } } 在上面的示例中,myPrivateProperty是一个私有属性,只能在MyClass类的内部访问。 2、使用...
4.3 private 当类的成员被定义为private后,只能被类的内部访问。 class Mom { private labour() { return 'baby is coming' } } class Son extends Mom { test () { this.labour() // Error, Property 'labour' is private and only accessible within class 'Mom' } } 代码解释: 第9 行,父类中的...
静态成员同样可以使用publicprotected和private这些可见性修饰符: class MyClass { private static x = 0; } console.log(MyClass.x); // Property 'x' is private and only accessible within class 'MyClass'. 静态成员也可以被继承: class Base { static getGreeting() { return "Hello world"; } } cl...
console.log(p.name,p.age);//外部无法访问 private修饰符 (除了自己都访问不到) class Animal { constructor(private name: string, private age: number) {this.name =name;this.age =age; console.log(this.name,this.age);//自身可以访问} } class Cat extends Animal { constructor(name: string, ag...
class Animal { public name; public constructor(name) { this.name = name; } } let a = new Animal('Jack'); console.log(a.name); // Jack a.name = 'Tom'; console.log(a.name); // Tom 实例a 成功获取公共属性 name private
class BadGreeter { name: string; // Property 'name' has no initializer and is not definitely assigned in the constructor. } class GoodGreeter { name: string; constructor() { this.name = "hello"; } } 注意,字段需要在构造函数自身进行初始化。TypeScript 并不会分析构造函数里你调用的方法,进而...
classMyClass{privatestaticx=0;}console.log(MyClass.x);// Property 'x' is private and only accessible within class 'MyClass'.复制代码 静态成员也可以被继承: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classBase{staticgetGreeting(){return"Hello world";}}classDerivedextendsBase{myGreeting...
.log(`Hello, my name is${this.name}. I'm${this.age}years old.`);}}constperson=newPerson("Alice",18);person.sayHello();// Output: Hello, my name is Alice. I'm 18 years old.console.log(person.name);// Error: Property 'name' is private and only accessible within class 'Person...
classBar{privatename:string; }classFoo{privatename:string; }letbar: Bar =newFoo();// ❌//Type 'Foo' is not assignable to type 'Bar'.//Types have separate declarations of a private property 'name'. 上面的这些概念规则来源于TypeScript Handbook,这里只是做个简要的引子。
classMyClass{private_myProperty:string;getmyProperty():string{returnthis._myProperty;}setmyProperty(value:string){this._myProperty=value;}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 4. 使用存取器 最后,我们可以通过类的实例来使用存取器。存取器的使用类似于访问类的属性,但实际上是调用了get...