-<script src="{{ site.root }}/assets/js/jquery.min.js"></script>
-<script src="{{ site.root }}/assets/js/bootstrap.min.js"></script>
-<script src="{{ site.root }}/assets/js/lesson.js"></script>
+{% comment %}
+ If previewing locally, site.root is set in _config_dev.yml.
+ If site.root is not set, assume we're viewing on the web.
+{% endcomment %}
+{% if site.root %}
+ {% assign root = site.root %}
+{% else %}
+ {% assign root = site.github.url %}
+{% endif %}
+<script src="{{ root }}/assets/js/jquery.min.js"></script>
+<script src="{{ root }}/assets/js/bootstrap.min.js"></script>
+<script src="{{ root }}/assets/js/lesson.js"></script>