JavaScript array unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.
Example
You can try to run the following code to learn how to add new array elements at the beginning of an array:
<html>
<head>
<title>JavaScript Array unshift Method</title>
</head>
<body>
<script>
var arr = new Array("orange", "mango", "banana", "sugar");
var length = arr.unshift("water");
document.write("Returned array is : " + arr );
document.write("<br /> Length of the array is : " + length );
</script>
</body>
</html> Output
Returned array is : water,orange,mango,banana,sugar Length of the array is : 5