class Son extends Mom { test () { this.labour() // Error, Property 'labour' is private and only accessible within class 'Mom' } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 代码解释: 第9 行,父类中的 labour() 方法被定义为私有方法,
// 定义一个抽象类abstract class BaseAbstractClass { abstract abstractMethod(): void;abstract abstractProperty: string;}// 另一个抽象类继承自 BaseAbstractClassabstract class DerivedAbstractClass extends BaseAbstractClass {// 重新定义属性abstract abstractProperty: string;concreteProperty: number=42;// 实现...
Example: Abstract Class with Abstract Property Copy abstract class Person { abstract name: string; display(): void{ console.log(this.name); } } class Employee extends Person { name: string; empCode: number; constructor(name: string, code: number) { super(); // must call super() this....
Property 'age' comes from an index signature, so it must be accessed with ['age']. 抽象构造签名 有如下代码: interfaceIShape{getArea():number;}classShapeimplementsIShape{getArea(){return2;}}functionmakeSubclassWithArea(Ctor:new()=>IShape){returnclassextendsCtor{}}letMyShape=makeSubclassWithArea...
class S { static name = "S!"; // Static property 'name' conflicts with built-in property 'Function.name' of constructor function 'S'. } 为什么没有静态类?(Why No Static Classes?) TypeScript(和 JavaScript) 并没有名为静态类(static class)的结构,但是像 C# 和 Java 有。
// Property 'salary' is private and only accessible within class 'Employee'. 2.私有属性无法在子类中访问 class Employee { public name; private salary=10000; public constructor(name) { this.name = name; } printSalary() { return this.salary ...
property: string; (arg: number) : boolean; } 1. 2. 3. 4. (3)构造签名 通过在调用签名前添加new关键字来写一个构造签名 class Ctor { s: string constructor(s: string) { this.s = s } } type SomeConstructor = { new (s: string): Ctor } ...
console.log(p3.name) =>// 报错// vsCode里面我们可以看见还未打印就已经报错:属性“name”为私有属性,只能在类“Testname”中访问// 解析文件文件直接报错:Property 'name' is private and only accessible within class 'Testname'// 由此可知,private的属性只能在类里面被调用,否则无法调用// protected =>...
class MyClass { static x = 0; static printX() { console.log(MyClass.x); }}console.log(MyClass.x);MyClass.printX();静态成员同样可以使用 public protected 和 private 这些可见性修饰符：class MyClass { private static x = 0;}console.log(MyClass.x);// Property 'x' is private...
classPerson { name: string ='yzr';// 设置属性默认值 age?: number;// 修饰成可选属性 constructor(name: string, age: number) { this.name = name; // this.age = age; } } letp =newPerson('bai', 200); tsconfig 中配置strictpropertyinitialization: true ...