Alma BIB API - Working with XML

index.js

var alma = require ('almarestapi-lib');
var xpath = require('xpath');
var dom = require('xmldom').DOMParser

const XPATH_TITLE = '/record/datafield[@tag="245"]/subfield[@code="a"]';
const XPATH_AUTHOR = '/record/datafield[@tag="100"]/subfield[@code="a"]';
const MMS_ID = '99469654400561';
let title, author, bib, doc;

( async () => {
  /* With application/xml */
  bib = (await alma.getXmlp(`/bibs/${MMS_ID}`))
  doc = new dom().parseFromString(bib)
  title = xpath.select('/bib/' + XPATH_TITLE, doc)[0].firstChild.data;
  console.log('title', title);

  /* With application/json */
  bib = (await alma.getp(`/bibs/${MMS_ID}`)).anies[0];
  doc = new dom().parseFromString(bib)
  author = xpath.select(XPATH_AUTHOR, doc)[0].firstChild.data;
  console.log('author', author);
})()

$ npm i xmldom xpath almarestapi-lib
$ node index.js