<html>
<head>
<title>randomize an array in javascript</title>
</head>
<body>
<p>Click the button to test:</p>
<button onclick="myFunction()">Randomize an array</button>
</br>
<textarea style="width: 400px;height: 200px;"id="demo"></textarea>
<script>
var arr=[1,9,7,5,4];
function myFunction() {
shuffle(arr);
document.getElementById("demo").innerHTML =arr;
}
document.getElementById("demo").innerHTML=arr;
function shuffle(array) {
var currentIndex = array.length, temporaryValue, randomIndex ;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = array[currentIndex];
array[currentIndex] = array[randomIndex];
array[randomIndex] = temporaryValue;
}
return array;
}
</script>
</body>
</html>
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