[]ts项目 模块问题

//b文件 

export default class player extends Laya.Sprite {

    constructor() {

        super();

        this.pivot(this.width / 2, this.height / 2);

        this.graphics.drawRect(0, 0, this._size, this._size, this._color);

    }

}

//a文件

import player from './player';

// 程序入口

class GameMain {

    constructor() {

        Laya.init(640, 960);

        var stage = Laya.stage;

        let p1 = new player();

    }

}

new GameMain();