To remove an item from an array in JavaScript, firstly get the item and then remove it using the splice() method. You can try to run the following code −
Example
<html>
<body>
<script>
var array = [10, 30, 40, 80, 90];
var index = array.indexOf(90);
document.write("Original array: "+array);
if (index > -1) {
array.splice(index, 1);
}
document.write("<br>New array after deletion: "+array);
</script>
</body>
</html>Output
Original array: 10,30,40,80,90 New array after deletion: 10,30,40,80