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:

  var player = document.getElementById('player');

  player.addEventListener('attached', function() {
    var target = parent.postMessage ? parent : (parent.document.postMessage ? parent.document : undefined);
    if (typeof target != "undefined" && window !== window.parent) {
      var w = player.getElementsByClassName('asciinema-player')[0].offsetWidth;
      var h = Math.max(document.body.scrollHeight, document.body.offsetHeight);
      target.postMessage(['asciicast:size', { width: w, height: h }], '*');
    }
  });