Using haven't vue plug-in slide switch, is there any information dynamic method for current slides, what page?

Thought for a long time to the two methods, either to monitor currentSlide () value, either across the about button and slide the currentSlide methods add
But the former, about how to use watch on a long list of expressions, such as this. Haven. CurrentSlide () cannot be achieved, whether writing in watch or computed seem no effect, but you need to be there was a way to listen to, the latter, left and right arrows and slipped the logic of writing in a deeper place, don't know how to extract the rewrite, strives for the great god give directions