How to tell when less is loaded?

[Smudded]

I'm using the the less-loader in my project, and due to some interesting circumstances I care about the height of my app when it first renders. Unfortunately, when the app finishes its first render the styles have not yet loaded. It doesn't seem there's a way to tell when the styles have loaded and store that state within my app so I can delay any kind of measuring I do. I've attempted importing the less file and checking the resulting object, but it seems to be empty. I may just be looking in the wrong places, but any suggestions would be appreciated!