TypeScript接口

属性类型接口

interface FullName {
    firstName: string;
    secondName?: string;
}
function printName(params:FullName) {
    console.info(params.firstName+":"+params.secondName)
} 
let jack = {age: 10,firstName:"Li"};
printName(jack);

函数类型接口

定义了函数的参数。包括入参和出参。

interface encrypt {
    (val:string, salt:string):string; // 入参val和salt，返回字符串
}
let md5:encrypt;
md5 = function(val:string, salt:string){
    return "";
}

可索引类型接口

interface Users {
    [index: number]: string;  // [index: string]: string;
}

let u:Users = ["Li", "Zhang"]; // {name:"Li", age:10}
console.info(u[0])

类类型接口

interface Animal {
    name: string;
    setName(n: string):void;
}

class Person implements Animal {
    ...
}