find match in child elements / trumbowyg

I have a form and i must check element in textarea/ div with trumbowyg.

$("#test").keyup(function() {
  var val = $(this).val();
  if (val.match(/{event_title}/g)) {
    $("p.eventTagTitle").addClass("true");
  } else {
    $("p.eventTagTitle").removeClass("true");
  }
  if (val.match(/{event_form}/g)) {
    $("p.eventTagForm").addClass("true");
  } else {
    $("p.eventTagForm").removeClass("true");
  }
  if (val.match(/{event_author}/g)) {
    $("p.eventTagAuthor").addClass("true");
  } else {
    $("p.eventTagAuthor").removeClass("true");
  }
});

jsfiddle.net/f1m33312/3

but

in trumbowyg not works

jsfiddle.net/f1m33312/4

similar solution in trumbowyg not work when add text to div

Trumbowyg editor have special event: tbwchange (from http://alex-d.github.io/Trumbowyg/documentation.html).

You should just replace one line

$("#test").keyup(function() {

to

$("#test").on('tbwchange', function() {

Done on fiddle: http://jsfiddle.net/f1m33312/6/