function () {
                            return !!document.querySelector('[data-markdown]');
                          }
                        },
                        {
                          src: 'https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.6.0/plugin/markdown/markdown.min.js',
                          condition: function () {
                            return !!document.querySelector('[data-markdown]');
                          }
                        },
                        {
    