From adbfea79a4029273a35706c3fbaf43652ee0ae8a Mon Sep 17 00:00:00 2001
From: Jordan Dukart <jordan@discoverygarden.ca>
Date: Thu, 28 Oct 2021 13:10:28 -0300
Subject: [PATCH] Check if the cue has changed before updating the HTML. (#853)

---
 modules/islandora_audio/js/audio.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/islandora_audio/js/audio.js b/modules/islandora_audio/js/audio.js
index de0daec73..97e29fd5b 100644
--- a/modules/islandora_audio/js/audio.js
+++ b/modules/islandora_audio/js/audio.js
@@ -23,8 +23,10 @@
             initialized = true;
             if ($('audio')[0].textTracks.length > 0) {
                 $('audio')[0].textTracks[0].oncuechange = function() {
+                  if (this.activeCues.length > 0) {
                     var currentCue = this.activeCues[0].text;
                     $('#audioTrack').html(currentCue);
+                  }
                 }
             }
         }