.player javascript: $(function() { var playerClass = #{player_class.html_safe}; window.player = new playerClass({ el: $('.player'), speed: #{speed}, benchmark: #{benchmark}, model: new AsciiIo.Asciicast(#{asciicast.html_safe}), containerWidth: #{container_width || 'null'}, rendererClass: #{renderer_class.html_safe}, autoPlay: #{auto_play}, hud: #{hud} }); });