Update captions using current track's active cues Also optional array argument in case there isn't any track (ex: vimeo)
function updateCues(input) {
	    // Requires UI
	    if (!this.supported.ui) {
	      return;
	    }

	    if (!is$1.element(this.elements.captions)) {
	      this.debug.warn('No captions element to render to');
	      return;
	    } // Only accept array or empty input


	    if (!is$1.nullOrUndefined(input) && !Array.isArray(input)) {
	      this.debug.warn('updateCues: Invalid input', input);
	      return;
	    }

	    var cues = input; // Get cues from track

	    if (!cues) {
	      var track = captions.getCurrentTrack.call(this);
	      cues = Array.from((track || {}).activeCues || []).map(function (cue) {
	        return cue.getCueAsHTML();
	      }).map(getHTML);
	    } // Set new caption text


	    var content = cues.map(function (cueText) {
	      return cueText.trim();
	    }).join('\n');
	    var changed = content !== this.elements.captions.innerHTML;

	    if (changed) {
	      // Empty the container and create a new child element
	      emptyElement(this.elements.captions);
	      var caption = createElement('span', getAttributesFromSelector(this.config.selectors.caption));
	      caption.innerHTML = content;
	      this.elements.captions.appendChild(caption); // Trigger event

	      triggerEvent.call(this, this.media, 'cuechange');
	    }
	  }