I need to read a file where the content is written in XML. I want to convert the content in JSON and then acceed to its components (sigma,type). The problem is that I have one method to convert from xml to json, but I think it is not working. The code is the next one:

function xmlToJson2( xml ) {
 
    // Create the return object
    var obj = {};
   
    if ( xml.nodeType == 1 ) { // element
      // do attributes
      if ( xml.attributes.length > 0 ) {
      obj["@attributes"] = {};
        for ( var j = 0; j < xml.attributes.length; j++ ) {
          var attribute = xml.attributes.item( j );
          obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
        }
      }
    } else if ( xml.nodeType == 3 ) { // text
      obj = xml.nodeValue;
    }
   
    // do children
    if ( xml.hasChildNodes() ) {
      for( var i = 0; i < xml.childNodes.length; i++ ) {
        var item = xml.childNodes.item(i);
        var nodeName = item.nodeName;
        if ( typeof(obj[nodeName] ) == "undefined" ) {
          obj[nodeName] = xmlToJson2( item );
        } else {
          if ( typeof( obj[nodeName].push ) == "undefined" ) {
            var old = obj[nodeName];
            obj[nodeName] = [];
            obj[nodeName].push( old );
          }
          obj[nodeName].push( xmlToJson2( item ) );
        }
      }
    }
    return obj;
  };

I call that method this way

let reader2 = new FileReader();
                reader2.readAsText(file2);
                reader2.onloadend = (evt) => {
                    var parser = new DOMParser();
                    var xmlDoc = parser.parseFromString(evt.target.result,"text/xml");
                    let stored = JSON.stringify(xmlToJson2(xmlDoc));
                    this.data.type = stored[0].type;
                    this.data.sigma = stored[0].sigma;
                    this.data.states = stored[0].states;
                    this.data.stack = stored[0].stack;
                    this.data.button = button;
                    let res = filename2.split(".");
                    this.data.filename2 = res[0];
                    this.parent.dispatchEvent(new CustomEvent('dialog', { detail: { action: 'selection_data', data: this.data } }));

evt.target.result is the xml content as a string

I think the conversion method is not working because the json content is not how it was supposed to be. The first one is the xml and then the JSON conversion.

What can I do?