random-arr-bugged.html

<html>
<script>
	 //https://stackoverflow.com/a/12646864
	function shuffleArray(array){
    	for(let i = array.length - 1; i > 0; i--){
			const j = Math.floor(Math.random() * (i + 1));
        	[array[i], array[j]] = [array[j], array[i]];
		}
		return array;
	}

	var x = [1,2,3,4,5];

	document.write("ORIG (BEFORE): " + x + "<br><br>");

	var y = shuffleArray(x);

	document.write("ORIG (AFTER): " + x + "<br><br>");
	document.write("SHUFF: " + y + "<br><br>");
</script>
</html>