Selecting element from DOM with JavaScript and XPath

Question

I\'m trying to figure out how to select the textarea in the code below using xpath and JavaScript (which is the only option here).

Answer 1

The evaluate method does not return a DOM node as you seem to expect. You would need

var element = document.evaluate( '//body//form/p/textarea' ,document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue;
if (element != null) {
  element.value = '...';
}