jQuery - Find object containing direct textNode content

getTextNodes.txt

function getTextNodes(cssSelector, findString) {
  var items = $(cssSelector)
    .contents()
    .filter(function() {
      var isText = this.nodeType == Node.TEXT_NODE;

      if (isText) {
        var text = $.trim(this.textContent);

        if (text.length && text.indexOf(findString) > -1) {
          return true;
        }
      }

      return false;
    });

  return items.length ? items : false;
}

var items = getTextNodes(".test p", "5");

if (items) {
  items.each(function() {
    $(this.parentNode).addClass("yup");
  });
}