document.getElementByXpath

get_element_by_xpath.js

//https://stackoverflow.com/questions/12689768/how-can-i-extend-the-document-object
//https://stackoverflow.com/questions/10596417/is-there-a-way-to-get-element-by-xpath-using-javascript-in-selenium-webdriver


if (typeof HTMLDocument !== 'undefined') {
      HTMLDocument.prototype.getElementByXpath=function (path) {
      return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
    };
} else {
      Document.prototype.getElementByXpath=function (path) {
      return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
    };
}

console.log( document.getElementByXpath("//html[1]/body[1]/div[1]") );