How do I get a callback that runs after my entire page has been rendered for the first time?

[JamesMGreene]

Similar to this answered question:

* How do I get a callback that runs after my template is attached to the DOM?*
This is now straightforward with the rendered callback.

How do I get a callback that runs after my entire page has been rendered for the first time? (e.g. similar to window.onload)

[tmeasday]

Does the rendered callback for the outer template not work?

[JamesMGreene]

I am hoping for something generic where I don't need to specify any particular template name, e.g. Template.all.rendered.

[tmeasday]

Hmm, nothing like that exists, but you might be able to achieve what you want using a router hook?