how to know if an embedded ember application is ready

i have a simple static html page with an ember application implemented via a <script> tag. On this page I also have a loading animation in a div with the class loader that I want to hide once the ember application is started or ready.

Since I don't know Ember.js, and the code of the application is minimized, I hope that someone can tell me an default event from Ember.js or something like that I can wait for and then use JS to hide the animation.