_section.html

<% if (!_.isString(slide) && !_.isArray(slide) && _.isObject(slide)) { %>
    <section data-separator="^\n\n\n"
             data-transition="none"
             data-vertical="^\n\n"
             <%= _.map(slide.attr, function (val, attr) {return attr + '="' + val + '"'}).join(' ')%> <% if (_.isString(slide.filename)) { %>data-<% if (slide.filename.indexOf('.html') !== -1) { %>html<% } else { %>markdown<% }%>="slides/<%= slide.filename %>"<% } %>></section>
<% } %><% if (_.isString(slide)) { %>
    <section data-separator="^\n\n\n"
             data-transition="none"
             data-vertical="^\n\n"
             data-<% if (slide.indexOf('.html') !== -1) { %>html<% } else { %>markdown<% }%>="slides/<%= slide %>"></section>
<% } %>