Add onDrag function which returns percent completion; Close #2

[JacobDB]

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Added a simple function that returns the percent completion so that developers can do things relative to the total completion (such as fading in an overlay as the user drags).

[osrec]

Hi Jacob,

Thanks for this :)

Could you put offsetWidth into a variable so that we are not triggering layout/reflow each time on line 119 and 124 here: https://github.com/osrec/SuperSlide.js/pull/4/commits/e0e88dcec1b986106dea8a390a85d0ae9994e83a#diff-ce41a7853f6663e487226c470a1d7f0aR119

Probably worth defining it before getting into the touchmove function, as it's not really going to change after the touchstart event.

Thanks very much! OSREC Dev Team

[JacobDB]

Sure thing, I've moved that in to a variable.

[JacobDB]

Actually, I think it might've messed up the slideRight transition, investigating...

[JacobDB]

Fixed, I was calling me.p.sliderOffsetWidth instead of me.p.slider.offsetWidth for slideRight.

[JacobDB]

@osrec have you had a chance to take a look at this? Would love it to get merged in to master.

[osrec]

Hello, sorry for the delay. Very busy in the office. Promise to get this merged in the next couple of days!

[JacobDB]

Great, thanks much!

[JacobDB]

Any status update on this? Would love to start using this script more regularly