play audio in javascript

1var audio = new Audio("folder_name/audio_file.mp3");
2audio.play();

1var audio = new Audio('audio.mp3');
2  audio.play();

1<script>
2function play() {
3  var audio = new Audio('https://interactive-examples.mdn.mozilla.net/media/examples/t-rex-roar.mp3');
4  audio.play();
5}
6</script>
7<button onclick-"play();">PLAY MY AUDIO</button>

1var audio = new Audio('audio_file.mp3');
2audio.play();

1
2var bMusic = new Audio('welcome1.mp3')
3	bMusic.play()

1//play audio with from html audio element: 
2document.getElementById('myAudioTagID').play();
3
4//play audio with out html audio tag
5var myAudio = new Audio('my_great_song.mp3');
6myAudio.play();