{{ body_tags }}

The body tags object is simply a shortcut placeholder for all of the javascript tags add to the body using the {% add_javascript body %} tag.

Note that this object must appear after all scripts have been added. Any scripts that have not been added when the {{ bdy_tags }} object is evaluated will not be included. If the {{ body_tags }} object is included multiple times, it will only output any NEW scripts that were added to the body AFTER the previous {{ body_tags }} object was evaluated (which means that attempting to do something like {% if body_tags %}{{ body_tags }}{% endif %} will NEVER display any results).