Uncaught ReferenceError: _interval is not defined when render_aync with Selector

[fffx]

I use render_async with:

render_async some_path,  toggle: { selector: "#sync_load_trigger" }

when I click sync_load_trigger button I got

(index):11015 Uncaught ReferenceError: _interval is not defined
    at HTMLLIElement.<anonymous> ((index):11015)

render_async version: 2.1.2

My workaround is define a global variable _interval before render_async

 <script type="text/javascript">
       _interval = null
 </script>

[nikolalsvk]

Fix for this is here #93

[nikolalsvk]

I've just released new version 2.1.3! Feel free to check if everything is OK https://rubygems.org/gems/render_async/versions/2.1.3