getCurProgress: function(type){
var currentLocation = vm.rendition.currentLocation();
if (type=='prev') {
vm.progress = (Math.floor(vm.locations.percentageFromCfi(currentLocation.start.cfi)*10000)/100).toFixed(0);
}
if (type=='next') {
vm.progress = (Math.floor(vm.locations.percentageFromCfi(currentLocation.start.cfi)*10000)/100).toFixed(0);
}else {
vm.progress = (Math.floor(vm.locations.percentageFromCfi(currentLocation.start.cfi)*10000)/100).toFixed(0);
}
this.$refs.progress.style.backgroundSize = `${vm.progress}% 100%`;
},
