code: function skipWhitespaceNodes(e, next) {
  		while (e && (e.nodeType === 8 || (e.nodeType === 3 && /^[ \t\n\r]*$/.test(e.nodeValue)))) {
  			e = next(e);
  		}
  		return e;
  	}
docs: Skips text nodes that only contain whitespace since they aren't semantically important.