@speechkit/speechkit-audio-player/src/utils/ParseXML.js

A web player component that can play audio from https://speechkit.io

const stringToXML = sXml => {
  if (typeof window.DOMParser !== 'undefined') {
    return new window.DOMParser().parseFromString(sXml, 'text/xml');
  } else if (typeof window.ActiveXObject !== 'undefined' && new window.ActiveXObject('Microsoft.XMLDOM')) {
    const xmlDoc = new window.ActiveXObject('Microsoft.XMLDOM');
    xmlDoc.async = 'false';
    xmlDoc.loadXML(sXml);
    return xmlDoc;
  }
  return false;
}

// Return array of all nodes in aXMLNodes that have sAttribute equal to sReqValue
const getNodesWithAttrValue = (aXMLNodes, sAttribute, sReqValue) => {
  const aNodes = Array.apply(null, aXMLNodes);

  return aNodes.filter(node => node.nodeType !== 3) //filter out text nodes
               .filter(node => node.getAttribute(sAttribute) === sReqValue); //filter for node value
}

// Return array of textContent of all nodes in aXMLNodes that have sAttribute equal to sReqValue
// Currently used for getting tracking urls
const getContentOfNodesWithAttrValue = (aXMLNodes, sAttribute, sReqValue) => {
  const aNodes = getNodesWithAttrValue(aXMLNodes, sAttribute, sReqValue);
  return aNodes.map(node => node.textContent);
}

// Take array of XML Nodes & return array of the text content of each node
// (used for getting error/impression urls)
const getNodeValues = aXMLNodes => {
  const aNodes = Array.apply(null, aXMLNodes);

  return aNodes.filter(node => node.nodeType !== 3) // filter out text nodes
               .map(node => node.textContent);     // then return textContent
}

// pass in xml node and event type string, return array of events
const getVASTEventURLs = (xNode, sEventType) => {
  const xEvents = xNode.getElementsByTagName(sEventType),
      aEventNodes = Array.apply(null, xEvents),
      aEventUrls = getNodeValues(aEventNodes);
  return aEventUrls;
}

//store error/impression events from VAST XML
const getCreative = xAd => {
  // Look for all creatives:
  const xCreatives = xAd.getElementsByTagName('Creative'),
      aCreatives = Array.apply(null, xCreatives);

  // now filter for those creatives that have a linear node
  const aFilteredCreatives = aCreatives.filter(node => node.getElementsByTagName('Linear').length)
  // take the first linear creative (can expand for adservers returning >1)
  const xCreative = aFilteredCreatives[0];

  return xCreative;
}

export {
  stringToXML,
  getCreative,
  getVASTEventURLs,
  getNodesWithAttrValue,
  getContentOfNodesWithAttrValue,
}