Add classes on initial load.

[samburgers]

Hi again, this package doesn't appear to add the headroom specific classes until the user scrolls. The behaviour of the original headroom adds these on load. The headroom--top class is the one that I need to target. Many thanks!

Demos to compare:

http://wicky.nillia.ms/headroom.js/

and

https://dalphyx.github.io/vue-headroom/

cheers

[dalphyx]

@samburgers the behaviour of vue-headroom calculate the state and add classes on load that same with react-headroom . Unlike headroom.js it just add classes.