Warto w przyszłości pomyśleć nad tym: http://www.jquery4u.com/ajax/jquery-ajax-error-handling-function/
checkbox, radio:
  http://exacttarget.github.io/fuelux/
  https://github.com/fronteed/iCheck

/poligon/react-render-test/no-router.php
/poligon/react-render-test/router/router.php
Markdown editor: http://dillinger.io/
cia
Checkbox, radio buttons: http://codepen.io/heydon/pen/AtlsJ