关于typecript 装饰器相关的疑问

Question

如下代码var http:any=new Httpcliedn()如果不加:any会报错，这是为什么啊？

function logclass(params: string) {
    // console.log(params);
    return function (target: any) {
        console.log(params);
        console.log(target);
        target.apilogo = params;
    }
}
@logclass("装饰器工厂模式")
class Httpcliedn {
    constructor() {

    }
    getdata() {

    }
}
var http: any = new Httpcliedn();

console.log(http);
console.log(http.apilogo);