Descripton
URLhashListener option is listening for url hash change and is looking for slide with the same data name e.g. data-hash="zero"
Also startPosition option accept string: 'URLHash'. This will load coresponding item on startup. Browser history back button is also affected.
//Javascript
var owl = $('.owl-carousel'); // save reference to variable
owl.owlCarousel({
items:4,
loop:true,
center:true,
margin:10,
URLhashListener:true,
startPosition: 'URLHash'
});