How to unload data from XML file in Angular2 and process it with x2js?

Question

Parsing

I have an XML file that I'm trying to dump data from - first just text and then a JSON object using x2js

clickHandler() {
    let headers = new Headers();
    headers.append('Content-Type', 'text/xml');


    let text = '';
    this.http.get('./xml/text')
      .map((res: Response) => res.text()).subscribe(data => text = data);

    const x2js = new X2JS();
    const jsonObj = x2js.xml2js(xml);
    let parseString = require('xml2js').parseString;
    let xml = text; //?? 

    parseString(xml, function (err: any, result: any) {
     alert(result); }}

Can you please tell me how to accomplish this task?