The order of onRendered and onload depends on browsers

core
1

On Chrome on OS X, onload event for window is triggered after onRendered events of templates of a page.
On IE11, the order is reversed.

This browser dependency causes side-effects, for example, carousels in Bootstrap do not start when the page is loaded on IE11.

I hope that Meteor core team will fix this issue.

2

Please file bugs on GitHub: https://github.com/meteor/meteor/issues

3

done^^

Thank you for your quick advice.