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kabeer yaseen1,049 Points
document.GetelemetnbyId - I can make out it that getelementbyid is calling audio file by its id but what is document used here for ? is it in-built ? is it because the audio file drops into the document category ?
document.getElementById('container') would get an element with the ID of 'container' . Its selecting a html tag with the ID 'container'
Yes, play() is used for media files https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/play