how to autoplay vimeo video use javascript

gistfile1.txt

use player.js and small script code 

<script src="https://player.vimeo.com/api/player.js"></script> 
<script>
 $(document).ready(function(){
	var iframe = document.querySelector('iframe');
    var player = new Vimeo.Player(iframe);
    player.play();
    player.on('play', function() {
    alert('played the video!');
    });
 });
</script>