There is error when exceljs is used in code.

Error:

Error: "Zone.js has detected that ZoneAwarePromise (window|global).Promise has been overwritten.
Most likely cause is that a Promise polyfill has been loaded after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. If you must load one, do so before loading zone.js.)"
Angular 5
o exceljs.min.js:3

My service.ts file

import { Injectable } from '@angular/core';
import * as Excel from "exceljs/dist/exceljs.min.js";
import * as fs from 'file-saver';
@Injectable({
providedIn: 'root'
})
export class ExcelserviceService {

constructor() { }

generatereport(dummydata):void{

let workbook = new Excel.Workbook();

let worksheet = workbook.addWorksheet('Car Data');

}
}