npm install asciidoctor-reveal.js

var asciidoctor = require('asciidoctor.js')();
var Asciidoctor = asciidoctor.Asciidoctor();
var Opal = asciidoctor.Opal;
Opal.load('nodejs');
Opal.load('pathname');
require('asciidoctor-reveal.js');

var options = Opal.hash({'safe': 'safe',
                         'template_dir': 'node_modules/asciidoctor-reveal.js/dist/templates',
                         'backend': 'revealjs'});

var content = '= Title\n\n' +
              '== Slide 1\n\n' +
              'Content 1\n\n' +
              '== Slide 2\n\n' +
             'Content 2';
var result = Asciidoctor.$convert(content, options);