x
<html><body><audio id="myAudio" controls> <source src="horse.ogg" type="audio/ogg"> <source src="horse.mp3" type="audio/mpeg"> <track src="demo_sub.html"> Your browser does not support the audio element.</audio><p>Click the button to get the number of available text tracks.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myAudio").textTracks.length; document.getElementById("demo").innerHTML = x;}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_audio_texttracks by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 18:16:49 GMT --></html>