Uncaught TypeError: exists is not a function when attempting to use serial port in TypeScript

I want to use the serial port in my Ionic 2 project. I use Cordova BLE for iOS and Android but Cordova BLE does not support Windows 10. First I used npm install serialport in node-module. That's fine. When I use .js file and nodejs to work I can get data in the serial port via ex. 'COM3'. Below is my JavaScript code:

SerialPort =require("serialport")

var socketServer;
var serialPort;
var portName = 'COM3';
var sendData = "";

function startServer() {

serialListener();
}

function serialListener() {

var receivedData = "";

serialPort = new SerialPort(portName, {
    baudrate: 9600,
    dataBits: 8,
    parity: 'none',
    stopBits: 1,
    flowControl: false
});

serialPort.on("open", function () {

    console.log('open serial communication');

    // Listens to incoming data
    serialPort.on('data', function (data) {

        receivedData += data.toString();

        if (receivedData.indexOf('E') >= 0 && receivedData.indexOf('B') >= 0) {

            sendData = receivedData.substring(receivedData.indexOf('B') + 1,  receivedData.indexOf('E'));

            receivedData = '';
        }

        // send the incoming data to browser with websockets.
        //socketServer.emit('update', sendData);

        console.log(sendData);
    });
 });
  }
  exports.start = startServer;

When I run in nodejs as like node index.js Every think is OK. I easily get serial port data.

But now I can not use this method in TypeScript. My .ts code is below.

   import { Component, Injectable} from '@angular/core';

   declare function require(name: string);

   var SerialPort=require('serialport');



 @Injectable()
 export class ServicePort {

public socketServer: any;
public serialPort: any;
public portName: any = 'COM3';
public sendData: any = "";

public constructor() {

    console.log("Geldi");

    console.log(SerialPort);
    //this.serialListener();
}

serialListener() {

    var receivedData = "";

    this.serialPort = new SerialPort(this.portName, {
        baudrate: 9600,
        dataBits: 8,
        parity: 'none',
        stopBits: 1,
        flowControl: false
    });

    this.serialPort.on("open", () => {

        console.log('open serial communication');

        this.serialPort.on('data', (data)=> {

            receivedData += data.toString();

            if (receivedData.indexOf('E') >= 0 && receivedData.indexOf('B') >= 0) {

                this.sendData = receivedData.substring(receivedData.indexOf('B') + 1, receivedData.indexOf('E'));

                receivedData = '';
            }

            // send the incoming data to browser with websockets.
            //socketServer.emit('update', sendData);

            console.log(this.sendData);
        });
    });
}
}

I call above .ts like this:

import { Component} from '@angular/core';
import { NavController, Platform} from 'ionic-angular';
import {ServicePort} from '../serialport/servicePort';


 @Component({
   selector: 'page-home',
   templateUrl: 'home.html',
   providers: [ServicePort]
 })
export class HomePage {

  constructor(public navCtrl: NavController, private platform: Platform,         private portservice: ServicePort) {

    this.portservice.serialListener();
  }
 }

I get this error:

Uncaught TypeError: exists is not a function
at Function.getRoot (main.js:99030)
at bindings (main.js:98926)
at Object.<anonymous> (main.js:111823)
at Object.<anonymous> (main.js:111856)
at __webpack_require__ (main.js:20)
at Object.<anonymous> (main.js:112063)
at Object.<anonymous> (main.js:112527)
at __webpack_require__ (main.js:20)
at Object.<anonymous> (main.js:113162)
at __webpack_require__ (main.js:20)

Can I use JavaScript function in my TypeScript for my Ionic 2 project or can I use the serial port in TypeScript?