Possibility to add menu top offset

[viniciuspires]

I'm using angular-sticky-navigation to create some kind of "collapsing" menu feel on my app. The first menu is already fixed, and the second menu comes and sticks to the first menu, as the rest of the header disappears as the page scrolls (see images below). I wanted to set my upper menu height as an offset, so the lower menu would just stick to it when it reaches the upper menu.

It'd be great if there was a param to customize a top offset for the menu, what do you guys think?

^ Initial state

^ Starting to scroll

^ It passes the menu that should stick to the other

^ And then when it hits the top of the page it finally sticks to the other menu as I specified on my CSS class.

[danmindru]

hi there @viniciuspires & happy new year!
I think it makes a lot of sense. Would the offset param be set from the 'outside' or how do you see it happening?

Feel free to start a PR meanwhile :)
Dan