Javascript XPath Helper

xp.js

/**
 * Helper to make Javascript's XPath calls simpler.
 * Basically you just need to give a query to the xp function.
 * Especially useful in manual testing of XPath strings inside a browser's console.
 * 
 * Example:
 *  xp("//body/text()")
 * 
 * Author: Paolo Montesel
 * License: https://opensource.org/licenses/MIT
 * Copyright 2015
 * 
*/
function xp(path) {
  var r = [];
  var x = document.evaluate(path, document, null, XPathResult.ANY_TYPE, null);
  
  var item = x.iterateNext();
  while (item) {
    r.push(item);
    item = x.iterateNext();
  }
  
  return r;
}

/**
 * Helper funciton which returns strings (xp(...) returns text objects).
 * Useful for JSON.strinfigy(xps(query));
 */
function xps(query) {
  return xp(query).map(function (el) { return el.textContent; });
}