To merge two arrays in JavaScript, use the Array.concat() method. JavaScript array concat() method returns a new array comprised of this array joined with two or more arrays.
Example
You can try to run the following code to merge two arrays:
<html>
<head>
<title>JavaScript Array concat Method</title>
</head>
<body>
<script>
var alpha = ["a", "b", "c"];
var numeric = [1, 2, 3];
var alphaNumeric = alpha.concat(numeric);
document.write("alphaNumeric : " + alphaNumeric );
</script>
</body>
</html>Output
alphaNumeric : a,b,c,1,2,3