报错了， exports is not defined

class.ts:

export class createPerson implements Person

export class Human implements Animals

main.ts:

import { createPerson,Human } from './class'

命令行:

tsc main.ts -t es5

浏览器：

ReferenceError: exports is not defined

    at main.js:2:23

感觉不至于说不支持ES5语法才对呀...浏览器是最新chrome...