asciinema.org/app/views/api/asciicasts/show.html.slim

= player page.asciicast, page.playback_options
p.powered
  ' Powered by
  a href=root_url target="_top" asciinema

javascript:
  $(function() {
    var target = parent.postMessage ? parent : (parent.document.postMessage ? parent.document : undefined);
    if (typeof target != "undefined" && window !== window.parent) {
      var w = $('.asciinema-player').width();
      var h = $(document).height();
      target.postMessage(['asciicast:size', { id: #{page.asciicast_id}, width: w, height: h }], '*');
    }

    function onMessage(e) {
      var event = e.data[0];
      if (event == 'asciicast:play') {
        $('.start-prompt').click();
      }
    }

    window.addEventListener("message", onMessage, false);
  });