public static void staticMethod(){ System.out.println("interface staticMethod..."); } // 默认方法 public default void defaultMethod(){ System.out.println("interface defaultMethod..."); } public default void defaul
static staticMethod() { console.log("Static method called"); // console.log(this.instanceProp); // 错误:Property 'instanceProp' does not exist on type 'typeof MyClass'. } instanceProp = "Instance property"; instanceMethod() { console.log("Instance method called"); } } console.log(MyC...
minute: number): ClockInterface; } interface ClockInterface { // ClockInterface 实例的描述 tick(); } // createClock 作用:实现对 constructor 的检查 function createClock(ctor: ClockConstructor, hour: number, minute: number): ClockInterface { return new ctor(hour, minute); // ctor 为传入的类,...
interface A { value: A; other: string; } interface B { value: B; other: number; } When checking whether the type A is compatible with the type B, TypeScript will end up checking whether the types of value in A and B are respectively compatible. At this point, the type system nee...
interface Person { readonly name: string //只读 age?: number //可选 } 任意属性 有时候我们希望一个接口中除了包含必选和可选属性之外,还允许有其他的任意属性,这时我们可以使用 索引签名 的形式来满足上述要求。 interface Person { name: string age?: number [propName: string]: any } const p1: ...
interface Truck { vType: "truck"; // discriminant capacity: number; // in tons }在上述代码中,我们分别定义了 Motorcycle、 Car 和Truck 三个接口,在这些接口中都包含一个 vType 属性,该属性被称为可辨识的属性,而其它的属性只跟特性的接口相关。2...
interface SearchFunc { (source: string, subString: string): boolean; } let mySearch: SearchFunc; mySearch = function(src: string, sub: string): boolean { let result = src.search(sub); return result > -1; } 说明:对于函数类型的类型检查来说,函数的参数名不需要与接口里定义的名字相匹配。
name = name } } class Steering{ turnRight(){} turnLeft(){} } interface CarConfig{ tyreName: string ifTurnRight: boolean } class Car{ tyre:Tyre steering:Steering constructor(carConfig: CarConfig){ this.tyre = new Tyre(carConfig.name) this.steering = new Steering() if(carConfig.ifTurn...
static origin = new Point(0, 0); } 此命名类型“Point"等同于: 1 2 3 4 5 interface Point { x: number; y: number; length(): number; } 此命名值”Point"是一个构造器函数,它的类型相当于以下声明: 1 2 3 4 var Point: { new(x: number, y: number): Point; origin: Point; }; 在...
这是ts的interface中的一个概念。ts的interface就是"duck typing"或者"structural subtyping",类型检查主要关注the shape that values have。因此我们先来熟悉一下interface,再引出?的解释。 TypeScript普通方式定义函数: function print(obj: {label: string}) {console.log(obj.label);}let foo = {size: 10, ...