JSFiddle - React, Tailwind, and code Playground

HTML

<script type="text/xml" id="featureData">
  <wfs:FeatureCollection xmlns:ms="http://mapserver.gis.umn.edu/mapserver" xmlns:wfs="http://www.opengis.net/wfs" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd 
                           http://mapserver.gis.umn.edu/mapserver http://wms.pcn.minambiente.it/ogc?map=/ms_ogc/wfs/Numeri_Civici_2012.map&amp;SERVICE=WFS&amp;VERSION=1.0.0&amp;REQUEST=DescribeFeatureType&amp;TYPENAME=IN.NUMERICIVICI.2012&amp;OUTPUTFORMAT=XMLSCHEMA">
    <gml:boundedBy>
      <gml:Box srsName="EPSG:4326">
        <gml:coordinates>7.700007,44.802147 7.749396,44.849996</gml:coordinates>
      </gml:Box>
    </gml:boundedBy>
    <gml:featureMember>
      <ms:IN.NUMERICIVICI.2012 fid="IN.NUMERICIVICI.2012.2728384">

        <gml:boundedBy>
          <gml:Box srsName="EPSG:4326">
            <gml:coordinates>7.735138,44.810267 7.735138,44.810267</gml:coordinates>
          </gml:Box>
        </gml:boundedBy>
        <ms:boundary>
          <gml:Point srsName="EPSG:4326">
            <gml:coordinates>7.735138,44.810267</gml:coordinates>

          </gml:Point>
        </ms:boundary>
        <ms:id>13800026457291</ms:id>
        <ms:nome>Borgata Tetti Sotto</ms:nome>
        <ms:civico>16</ms:civico>
        <ms:istat>01004041</ms:istat>
        <ms:cap>12030</ms:cap>

        <ms:comune>CARAMAGNA PIEMONTE</ms:comune>
        <ms:nome_ted> </ms:nome_ted>
        <ms:provincia>CUNEO</ms:provincia>
        <ms:regione>PIEMONTE</ms:regione>
      </ms:IN.NUMERICIVICI.2012>
    </gml:featureMember>
    <gml:featureMember>

      <ms:IN.NUMERICIVICI.2012 fid="IN.NUMERICIVICI.2012.2736621">
        <gml:boundedBy>
          <gml:Box srsName="EPSG:4326">
            <gml:coordinates>7.735397,44.812403 7.735397,44.812403</gml:coordinates>
          </gml:Box>
       ...

JavaScript

var xmlText = $('#featureData').text(),
  $xmlData = $.parseXML(xmlText),
  $features = $('gml\\:featureMember, featureMember', $xmlData),
  extractedFeatures = [];

console.log($features.length)

$features.each(function() {
  var $this = $(this),
    feature = {},
    items = [
      'nome',
      'civico',
      'istat',
      'cap',
      'comune'
    ],
    item;

  for (var i = 0; i < items.length; i++) {
    item = items[i];
    feature[item] = $this.find('ms\\:' + item + ', ' + item).text();
  }

  extractedFeatures.push(feature);
});

$('#output').text(JSON.stringify(extractedFeatures));