function getElementByXpath(path) {
return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
}
console.log( getElementByXpath("//html[1]/body[1]/div[1]") );
document.evaluate('XPATH HERE', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;