ts：接口

接口是一系列抽象方法的声明。

定义

TypeScript 接口定义：

interface interface_name { 
}

举例

如下定义了一个接口 IPerson，接着定义了一个变量 customer，它的类型是 IPerson。

interface IPerson { 
    firstName:string, 
    lastName:string, 
    sayHi: ()=>string 
} 
 
var customer:IPerson = { 
    firstName:"Tom",
    lastName:"Hanks", 
    sayHi: ():string =>{return "Hi there"} 
} 

console.log(customer.firstName) 
console.log(customer.lastName) 
console.log(customer.sayHi())

接口继承

interface Person { 
   age:number 
} 
 
interface Musician extends Person { 
   instrument:string 
} 
 
var drummer = <Musician>{}; 
drummer.age = 27 
drummer.instrument = "Drums" 
console.log("年龄:  "+drummer.age)
console.log("喜欢的乐器:  "+drummer.instrument)