Add / Remove 'active' class from slides

[andrewmclagan]

Add / Remove 'active' class from slides. Developers can now scope CSS animations and specific styles to active slides.

[andrewmclagan]

I have submitted the above pull request. can you please review and integrate?? or discuss here... awesome!

[bchanx]

Hey @andrewmclagan,

Thanks for the PR! Some comments:

• In general, I like the active class addition, but it's a little too generic. I'm going to go with slidr-active instead.
• The callback after Slidr creation is fine, but I'm going to make some code styling changes to make it more fluent with the rest of the code. (i.e default the creation callback to NOOP, so we don't need type check when calling).

[bchanx]

Actually @andrewmclagan, is there a reason why you're passing the internal Slidr _ data struct to the callback? Most of those properties are meant for internal library usage and shouldn't really be exposed outside of the library.

It would make more sense to pass the callback.meta() params back, with probably null/empty values for out. The meta params limit the data exposed, but it has a reference to the slidr element for dom manipulation. Thoughts?

[bchanx]

Closing due to inactivity