NativeScript/apps/automated/app/http/http-string-worker.ts

import * as http from '@nativescript/core/http';

(<any>global).FormData = class FormData {};

declare var postMessage: any;

http.getString('https://httpbin.org/get').then(
	function (r) {
		postMessage(r);
	},
	function (e) {
		throw e;
	}
);