tracks/app/views/notes/update.js.erb

<% if @saved -%>
  TracksPages.hide_errors();
  TracksPages.page_inform("<%= t('notes.save_status_message', id: @note.id) %>");
  replace_note_form_with_updated_note();
<% else -%>
  TracksPages.show_errors(html_for_error_messages());
<% end %>

function replace_note_form_with_updated_note() {
  $('#<%= dom_id(@note, 'edit')%>').fadeOut(250, function() {
    $('#<%= dom_id(@note, 'edit')%>').html(html_for_updated_note_form());
    $('div.project_notes#<%= dom_id(@note)%>').html(html_for_updated_note_details());
    $('#<%= dom_id(@note)%>').fadeIn(500);
  });
}

function html_for_error_messages() {
  return "<%= js_error_messages_for(@note) %>";
}

function html_for_updated_note_form(){
  return "<%= js_render('note_edit_form', {}, @note) %>";
}

function html_for_updated_note_details(){
  return "<%= js_render('note_details', {}, @note) %>";
}