get () {
      let autoplay = Components.Html.slides[Glide.index].getAttribute('data-glide-autoplay')

      if (autoplay) {
        return toInt(autoplay)
      }

      return toInt(Glide.settings.autoplay)
    }
Gets time period value for the autoplay interval. Prioritizes
times in `data-glide-autoplay` attrubutes over options.

@return {Number}